D-35-SD_IOM_Manual

D-35-SD_IOM_Manual
INSTALLATION & SERVICE
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D-35-SD, G-35-SD
SLURRY DUTY PUMPS
WANNER ENGINEERING, INC.
1204 Chestnut Avenue, Minneapolis, MN 55403
TEL: (612) 332-5681 FAX: (612) 332-6937
TOLL-FREE FAX [US only]: (800) 332-6812
www.hydra-cell.com
email: [email protected]
Document Fax Back System (510) 745-0440
D-35-SD WPR = 300 psi; G-35-SD WPR = 21 bar
D-35-SD/G-35-SD Contents
Page
Installation .............................................................................. 2
Maintenance .......................................................................... 6
NOTE: The numbers in parentheses are the Reference
Numbers on the illustrations in the Parts Manual.
Service (Fluid End) ................................................................ 7
Service (Hydraulic End) ....................................................... 13
Troubleshooting ................................................................... 17
D-35-SD/G-35-SD Installation
Location
Important Precautions
Locate the pump as close to the supply source as possible.
Install it in a lighted clean space where it will be easy to inspect
and maintain. Allow room for checking the oil level, changing
the oil, and removing the manifold support (48), manifold (4),
and valve plate (17).
Adequate Fluid Supply. To avoid cavitation and
premature pump failure, be sure that the pump will have
an adequate fluid supply and that the inlet line will not be
obstructed. See “Inlet Piping”.
Mounting
Positive Displacement. This is a positive-displacement
pump. To avoid severe system damage if the discharge
line ever becomes blocked, install a relief valve
downstream from the pump. See “Discharge Piping”.
Do not exceed the maximum pump speed. Refer to the Pump
Specifications Manual for ratings.
Safety Guards. Install adequate safety guards over all
pulleys, belts, and couplings. Follow all codes and
regulations regarding installation and operation of the
pumping system.
The pump shaft can rotate in either direction.
To prevent vibration, mount the pump securely on a level rigid
base.
Shut-Off Valves. Never install shut-off valves between
the pump and discharge pressure regulator, or in the
regulator bypass line.
On a belt-drive system, align the sheaves accurately; poor
alignment wastes horsepower and shortens the belt and bearing
life. Make sure the belts are properly tightened, as specified by
the belt manufacturer.
Freezing Conditions. Protect the pump from freezing.
See also the Maintenance Section.
On a direct-drive system, align the shafts accurately to the
specifications of the coupler manufacturer.
2
D-35-SD/G-35-SD Installation
Inlet Piping (Suction Feed)
Hose Size and Routing
Caution: Do not pump at fluid temperatures above 120° F
(49° C). Consult the Factory for current ratings, based on
pump materials of construction.
Size the suction line at least one size larger than the pump
inlet, and so that the velocity will not exceed 1 to 3 ft/sec (0.3 to
0.9 m/sec):
Velocity (ft/sec)
Install draincocks at any low points of the suction line, to permit
draining in freezing conditions.
*where pipe I.D. is in inches
Keep the suction line as short and direct as possible.
The smallest permissible inlet hose size is:
Do not supply more than one pump from the same inlet line.
3 to 20 gpm ................................................................ 2 in. I.D.
Consult the Factory for the following situations:
•
•
•
•
•
0.408 x GPM
Pipe I.D. 2 *
Provide for permanent or temporary installation of a vacuum
gauge to monitor the inlet suction. Vacuum at the pump inlet
should not exceed 7 in. Hg (180 mm Hg).
•
=
21 to 37 gpm ........................................................ 2 1/2 in. I.D.
Extreme temperature applications — above 120° F (49° C)
or below 40° F (4° C)
Pressure feeding of pumps
Viscous or extremely abrasive fluid applications
Chemical compatibility problems
Hot ambient temperatures — above 100° F (38° C)
Conditions where pump oil may exceed 180° F (82° C)
because of a combination of hot ambient temperatures, hot
fluid temperature, and full horsepower load — an oil cooler
may be required
11 to 76 liters/min .................................................. 50 mm I.D.
77 to 140 liters/min ................................................ 64 mm I.D.
Use flexible hose and/or expansion joints to absorb vibration,
expansion, or contraction.
If possible, keep the suction line level. Do not have any high
points to collect vapor unless these high points are vented.
To reduce turbulence and resistance, do not use 90° elbows. If
turns are necessary in the suction line, use 45° elbows or
arrange sweeping curves in the flexible inlet hose.
If a block valve is used, be sure it is fully opened so that the
flow to the pump is not restricted. The opening should be at
least the same diameter as the inlet plumbing I.D.
Supply Tank
See the illustration on page 2.
Use a supply tank that is large enough to provide time for any
trapped air in the fluid to escape. The tank size should be at
least twice the maximum pump flow rate.
Do not use a line strainer or filter in the suction line unless
regular maintenance is assured. If used, it should have a freeflow area of at least three times the free-flow area of the inlet.
Isolate the pump and motor stand from the supply tank, and
support them separately.
Install piping supports where necessary to relieve strain on the
inlet line and to minimize vibration. These supports are
essential because the manifold and inlet/outlet adapters
are plastic and more susceptible to damage.
Install a separate inlet line from the supply tank to each pump.
Install the inlet and bypass lines so they empty into the supply
tank below the lowest water level, on the opposite side of the
baffle from the pump suction line.
Always tighten all piping connections, gauges, and regulators
before installing the piping cluster into the pump manifold.
If a line strainer is used in the system install it in the inlet line to
the supply tank.
Inlet Piping (Pressure Feed)
To reduce aeration and turbulence, install a completelysubmerged baffle plate to separate the incoming and outgoing
liquids.
Provide for permanent or temporary installation of a vacuum/
pressure gauge to monitor the inlet vacuum or pressure.
Pressure at the pump inlet should not exceed 50 psi (345 kPa);
if it could get higher, install an inlet pressure regulator.
Install a vortex breaker in the supply tank, over the outlet port
to the pump.
Place a cover over the supply tank, to prevent foreign objects
from falling into it.
Loctite is a registered trademark of Loctite Corporation. Teflon is a registered trademark of
E. I. DuPont de Nemours & Co. Inc. ScotchBrite is a trademark of 3M Company.
Do not supply more than one pump from the same inlet line.
Always tighten all piping connections, gauges, and regulators
before installing the piping cluster into the pump manifold.
3
D-35-SD/G-35-SD Installation
Inlet Calculations
Minimizing Acceleration Head and Frictional Losses
Acceleration Head
• Keep inlet lines less than 3 ft (1 m) long
• Use at least 2 in. (55 mm) I.D. inlet hose
• Use soft hose (low-pressure hose, noncollapsing) for the inlet
lines
• Minimize fittings (elbows, valves, tees, etc.)
• Use a suction stabilizer on the inlet.
To minimize the acceleration head and frictional losses:
Calculating the Acceleration Head
Use the following formula to calculate acceleration head losses.
Subtract this figure from the NPSHa, and compare the result to
the NPSHr of the Hydra-Cell pump.
Ha = (L x V x N x C) ÷ (K x G)
where:
Net Positive Suction Head
Ha = Acceleration head (ft of liquid)
L= Actual length of suction line (ft) — not equivalent length
V= Velocity of liquid in suction line (ft/sec) [V = GPM x (0.408 ÷
pipe ID2)]
N= RPM of crank shaft
C= Constant determined by type of pump — use 0.04 for the
D35-SD and G-35-SD Hydra-Cell pumps
K= Constant to compensate for compressibility of the fluid —
use: 1.4 for de-aerated or hot water; 1.5 for most liquids;
2.5 for hydrocarbons with high compressibility
G= Gravitational constant (32.2 ft/sec2)
NPSHa must be equal to or greater than NPSHr. If not, the
pressure in the pump inlet will be lower than the vapor pressure
of the fluid— and cavitation will occur.
Calculating the NPSHa
Use the following formula to calculate the NPSHa:
NPSHa = Pt + Hz - Hf - Ha - Pvp
where:
Pt = Atmospheric pressure
Hz = Vertical distance from surface liquid to pump centerline (if
liquid is below pump centerline, the Hz is negative)
Friction Losses
Hf = Friction losses in suction piping
Calculating Friction Losses in Suction Piping
Ha = Acceleration head at pump suction
When following the above recommendations (under “Inlet
Piping”) for minimum hose/pipe I.D. and maximum length,
frictional losses in the suction piping are negligible (i.e., Hf = 0)
if you are pumping a water-like fluid.
Pvp = Absolute vapor pressure of liquid at pumping temperature
NOTES:
• In good practice, NPSHa should be 2 ft greater than NPSHr
• All values must be expressed in feet of liquid
Atmospheric Pressure at Various Altitudes
When pumping more viscous fluids such as lubricating oils,
sealants, adhesives, syrups, varnishes, etc., frictional losses
in the suction piping may become significant. As Hf increases,
the available NPSH (NPSHa) will decrease, and cavitation will
occur.
Altitude Pressure
(ft)
(ft of H2O)
0
33.9
500
33.3
1000
32.8
In general, frictional losses increase with increasing viscosity,
increasing suction-line length, increasing pump flowrate, and
decreasing suction-line diameter. Changes in suction-line
diameter have the greatest impact on frictional losses; a 25%
increase in suction-line diameter cuts losses by more than two
times, and a 50% increase cuts losses by a factor of five times.
Altitude Pressure
(ft)
(ft of H2O)
1500
32.1
2000
31.5
5000
28.2
Discharge Piping
Use one of the following formulas to calculate friction losses in
your system. Subtract the resulting figure from the NPSHa, and
compare the result to the NPSHr of the Hydra-Cell pump.
NOTE: Consult the Factory before manifolding two or more
pumps together.
For flowrates of 3 to 20 gpm, use:
Hose and Routing
Hf = 0.25 ft x
CPS
100
x
GPM
20
x
L
3
Size the discharge line one or two sizes larger than the pump
discharge opening. Use the shortest, most direct route.
4
x
(ID2 )
x
(2.5
)
ID
Size the discharge line so that the velocity will not exceed 7 10 ft/sec (2 to 3 m/sec):
For flowrates of 21 to 37 gpm, use:
Hf = 0.20 ft x
CPS
100
x
GPM
37
x
L
3
4
Velocity (ft/sec)
=
where:
0.408 x GPM
Pipe I.D.2*
*where pipe I.D. is in inches
CPS = Viscosity of pumped material (in centipoise)
The smallest permissible discharge hose size is:
L = Length of suction line (in feet), and
3 to 20 gpm ................................................................ 1 in. I.D.
ID = Pipe I.D. (in inches)
21 to 37 gpm ........................................................ 1 1/4 in. I.D.
11 to 76 liters/min .................................................. 25 mm I.D.
77 to 140 liters/min ................................................ 32 mm I.D.
4
Use flexible hose between the pump and hard piping, to absorb
vibration, expansion, or contraction.
Before Initial Start-Up
Never install a shutoff valve in the discharge line between the
pump and the regulator, or in the bypass line.
Before you start the pump, be sure that:
•
Select pipe or hose with a working pressure rating of at least
1.5 times the maximum system pressure. Example: Select a
300-psi W.P.-rated hose for systems to be operated at 200-psigauge pressure.
•
•
Support the pump and piping independently. These supports
are essential, because the manifold and inlet/outlet
adapters are plastic and more susceptible to damage.
•
Pressure Regulation
•
IInstall a pressure regulator or unloader in the discharge
line. Bypass pressure must not exceed the pressure limit of
the pump.
•
Size the regulator so that, when fully open, it will be large enough
to relieve the full capacity of the pump without overpressurizing
the system.
All shut-off valves are open, and the pump has an adequate
supply of fluid.
All connections are tight.
The oil level is approximately 1 in. (2.5 cm) from the top of
the fill port — so that the floor of the upper reservoir within
the pump housing is flooded and the chamber itself is about
1/4 full, allowing for oil expansion as the pump runs and
heats up.
The relief valve on the outlet of the pump is adjusted so the
pump starts under minimum pressure.
All pulleys and belts are properly aligned, and belts are
tensioned according to specification.
ll pulleys and belts have adequate safety guards.
Initial Start-Up Procedure
1. Turn on power to the pump motor.
2. Check the inlet pressure or vacuum. Inlet vacuum must not
exceed 7 in. Hg at 70° F (180 mm Hg at 21° C). Inlet pressure
must not exceed 50 psi (345 kPa).
3. If you hear any erratic noise or if the flow is unsteady, refer
to the Troubleshooting Section.
4. If the system has an air lock and the pump fails to prime:
a. Turn off the power.
b. Remove the drain plug (1) on the bottom center of the
manifold.
Note: Fluid may come out of this port when the plug is
removed. Provide an adequate catch basin for fluid
spillage, if required. Fluid will come out of this port when
the pump is started, so we recommend that you attach
adequate plumbing from this port so fluid will not be
sprayed or lost. Use high-pressure-rated hose and
fittings from this port. Take all safety precautions to
assure safe handling of the fluid being pumped.
c. Jog the system on and off until the fluid coming from this
port is air-free.
d. Turn off the power.
e. Remove the plumbing that was temporarily installed, and
reinstall the drain plug (1).
5. Adjust the discharge pressure regulator to the desired
operating and bypass pressures.
6. After the pressure regulator is adjusted, set the “pop-off”
safety relief valve at 100 psi (690 kPa) higher than the
desired operating pressure. To verify this setting, adjust the
discharge pressure regulator upward until the relief valve
opens. Follow the recommendations in the above Note (Step
4b) for handling the fluid that will come from the relief valve.
7. Reset the discharge pressure regulator to the desired system
pressure.
8. Provide a return line from the relief valve to the supply tank,
similar to the bypass line from the pressure regulator.
Locate the valve as close to the pump as possible and ahead
of any other valves.
Adjust the pressure regulating valve to no more than 10% over
the maximum working pressure of the system. Do not exceed
the manufacturer’s pressure rating for the pump or regulator.
Route the bypass line to the supply tank, or to the suction line
as far as possible from the pump (to reduce the chance of
turbulence).
If the pump will be operating for a long time with the discharge
closed and fluid bypassing, install a thermal protector set to
trip at 120° F (49° C) in the bypass line — to prevent severe
temperature buildup in the bypassed fluid.
Caution: Never install shutoff valves in the bypass line or
between the pump and pressure regulator or relief valve.
Provide for permanent or temporary installation of a pressure
gauge to monitor the discharge pressure at the pump.
For additional system protection, install a “pop-off” safety relief
valve in the discharge line, downstream from the pressure
regulator.
Always tighten all piping connections, gauges, and regulators
before installing the piping cluster into the pump manifold.
5
D-35-SD/G-35-SD Maintenance
NOTE: The numbers in parentheses are the Ref. Nos. on
the illustrations in the Parts Manual.
Periodically
Change the oil after the first 100 hours of operation, and every
1000 operating hours thereafter. When changing, remove the
drain plug (36) at the bottom of the pump so all oil and
accumulated sediment will drain out.
Daily
Check the oil level and the condition of the oil. The oil level
should be 1 in. (2.5 cm) from the top of the fill port — so that
the floor of the upper reservoir within the pump housing is
flooded and the chamber itself is about 1/4 full, allowing for oil
expansion as the pump runs and heats up.
Caution: Do not turn the drive shaft while the oil reservoir
is empty.
Check the inlet pressure or vacuum periodically with a gauge.
If vacuum at the pump inlet exceeds 7 in. Hg (180 mm Hg),
check the inlet piping system for blockages. If the pump inlet is
located above the supply tank, check the fluid supply level and
replenish if too low.
Use the appropriate Wanner Hydra-Oil brand motor oil for the
application — contact Wanner Engineering if in doubt.
Caution: If you are losing oil but don’t see any external
leakage, or if the oil becomes discolored and contaminated,
one of the diaphragms (21) may be damaged. Refer to the
Service Section. Do not operate the pump with a damaged
diaphragm.
Caution: Protect the pump from freezing. Refer also to the
“Shutdown Procedure”.
Shutdown Procedure During
Freezing Temperatures
Caution: Do not leave contaminated oil in the pump housing
or leave the housing empty. Remove contaminated oil as
soon as discovered, and replace it with clean oil.
1. Disconnect the inlet and outlet piping from the pump.
2. Remove the drain plug (1) at the bottom center of the
manifold.
3. Open any draincocks in the piping.
4. Start the pump, and allow it to run until all fluid is removed
from the pump head.
5. Stop the pump, and reinstall the drain plug.
6. Fill the pump with antifreeze.
When you put the pump back into service, thoroughly flush the
antifreeze.
6
D-35-SD/G-35-SD Service (Fluid End)
7
D-35-SD/G-35-SD Service (Fluid End)
Note: The numbers in parentheses are the Ref. Nos. on the
illustrations in the Parts Manual.
Service Procedures
This section explains how to disassemble and inspect all easilyserviceable parts of the pump. Repair procedures for the
hydraulic end (oil reservoir) of the pump are included in a later
section of the manual.
1. Remove Inlet and Outlet
Adapters (49, 81)
Note: When removing the adapters as explained below,
twist them slightly to break loose any dried material that
may have caused them to stick in place. Then ease them
out of the manifold (you may have to pry carefully
between the adapter flange and manifold).
a. If your pump has SAE flange adapters, they can simply
be pulled out of the manifold.
b. If your pump has NPT or BSPT adapters, they are
fastened to the manifold support by four socket-head
capscrews and O-rings. Remove the capscrews (83,
outlet; 85, inlet) and O-rings (84, outlet; 86, inlet), then
pull the adapters out of the manifold.
c. Inspect each adapter, and replace if worn or if any cracks
have developed. Replace the O-rings (80, 82) with new
ones.
Caution: Do not disassemble the hydraulic end unless you
are a skilled mechanic. For assistance, contact Wanner
Engineering (Tel 612-332-5681 or Fax 612-332-6937) or the
distributor in your area.
Caution: The four capscrews (31) that screw through the
back of the housing into the cylinder casting hold the
casting over the hydraulic end of the pump. Do not remove
them except when repairing the hydraulic end.
Tools and Supplies
The following tools and supplies are recommended for servicing
the fluid end of the pump:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Wanner D-35/G-35 Tool Kit (includes 8 mm and 10 mm hex
bit sockets)
1/2 in. drive socket wrench
18 mm box-end wrench
Straightedge (at least 12 in. long)
Two 2 in-high blocks, approximately 2 to 3 in. wide and 8 to
10 in. long
Medium Phillips-head screwdriver
Mallet
1.50 in.-diameter rod, at least 2 in. long
1.75 in-diameter rod, approximately 4 in. long
Small torque wrench — rated to at least 27 in.-lbs (3 N-m)
Torque wrench — rated to at least 75 ft-lbs (100 N-m)
New oil
Grease or petroleum jelly
Water or compatible solvent for cleaning
2. Remove Manifold Support (48),
Manifold (4), and Valve Plate (17)
a. With a 10 mm hex Allen wrench, and an 18 mm box-end
wrench, remove all nuts (30) and capscrews (2) around
the manifold support plate. Do not remove the four
capscrews (31) that are installed through the back of
the pump housing.
b. With a 10 mm hex Allen wrench, remove the centerbolts
(46) and washers (47) in the center of the manifold
support plate.
Caution: Do not turn the pump drive shaft while the
manifold and valve plate are off the pump, except
when removing diaphragms or repriming the
hydraulic cells.
c. Remove the manifold support (48) and manifold (4).
d. Inspect the manifold support and manifold for warpage
or wear around the inlet and outlet ports. Also inspect
the manifold for warpage or wear in the area of the flow
channels, especially where the valve assemblies contact
the manifold and where the O-rings seal between
manifold and valve plate. If wear is excessive, replace
the manifold with a new one.
To check the manifold support for warpage, lay it on a
flat surface and place a straightedge across it. Check
both sides of the plate for warpage.
To check the manifold for warpage, first be sure the plug
(1) is removed, then lay it on a flat surface with the flow
channels facing you. Place a straightedge across the
surface of the manifold.
A warped manifold support or manifold should be
replaced.
e. With a 10 mm hex Allen wrench, remove the two sockethead capscrews (15) that hold the valve plate to the
cylinder casting.
Note: There is an O-ring (16) under the head of each
capscrew, which acts as a washer between it and
the plastic valve plate.
8
D-35-SD/G-35-SD Service (Fluid End)
Note: The valve seat remover tool must be tipped
approximately 45 ° to get it through the seat bore.
Continue pressing or tapping, as required, until the
spacer, crush seal, shell subassembly, spring, and valve
fall out of the valve bore.
Next, work the valve seat remover tool between the seat
holder (10) and the shoulder of the valve plate bore, again
through the small hole at the bottom of the diaphragm
pocket.
Press and tap down as required, working your way
around the edge of the seat holder to force the spacer
and seat subassembly evenly out of the valve bore.
c. Inspect both sides of the valve plate for wear, including
the diaphragm pockets, valve bores, and shoulders at
the bottom of each bore. Also inspect the face of the
valve plate (adjacent to the valve bores) for wear,
especially in the areas where the O-rings seal between
it and the manifold. Using a straightedge, inspect both
sides of the valve plate for warpage. If there is warpage
or excessive wear, replace the valve plate.
Note: A machined recess was cut around the
perimeter of the valve plate (next to the outer
manifold O-ring groove) at the factory. Do not
mistake this feature for warpage.
3. Remove and Inspect Valve
Assemblies (8-14, 41-45)
Note: Wanner Repair Kits contain some or all of the
required components to replace items (8-14) and (4145), as well as all O-rings for sealing the valve plate and
adapters to the manifold. Consult the appropriate Parts
Manual for your pump to determine which Repair Kit to
order.
Remove the Valve Assemblies
The five inlet and five outlet valve assemblies in the pump
are identical (but face in opposite directions). One at a time,
remove each valve assembly with the aid of the valve seat
remover tool (from the Wanner Tool Kit), then inspect and
reinstall the valve assembly as outlined below. Be careful
not to bend or break any of the metal valve components,
and not to gouge or scrape the plastic valve plate.
Remove the O-rings (5, 6, 7) from the valve plate, then set
it on 2 in.-high blocks with the valve assemblies facing down.
As you press out each valve assembly during the following
procedure, be sure there is enough open space below so
that the valve can come out of its bore unobstructed.
Inspect the Valve Components
Inspect the individual components of each valve as follows:
a. Check the spring retainer (14) that is housed inside the
shell (43). Be sure to locate the polyurethane washer
(42) that sits in the spring retainer recess and supports
the spring (12). If the spring retainer is worn in the area
of the four tabs that guide and act as a stop for the valve,
replace it.
Also look for wear in the area of the recess that supports
the spring. The polyurethane washer should have
minimized or prevented wear in this area if it stayed in
place during operation.
Press out the old spring retainer and push in a new one
if required. It is always a good idea to use a new
polyurethane washer in the spring retainer recess. Be
careful to put only one washer into each retainer recess.
b. Check the valve spring (12) for wear or damage. Compare
its free length to that of a new spring. A worn or otherwise
damaged spring should be replaced with a new one. Never
attempt to stretch an old spring and reuse it.
c. Check the valve (11) for uneven or excessive wear. If it
has developed an uneven wear pattern or is worn
excessively, do not reuse it — replace it with a new one.
A valve with an uneven wear pattern will not seal
effectively, even against a new seat, resulting in rough
operation and reduced output.
Note: Your pump has a urethane washer (41) in the
recess on the back side of each valve. It is there to
reduce or eliminate wear on the valve caused by
motion between the spring and valve. It also helps
minimize wear on the end of the spring. It is always
a good idea to replace these washers with new ones.
Be careful to put only one washer into each valve
recess.
To remove each valve assembly:
a. Inlet (5 center valves). From the large hole at the bottom
of the diaphragm pocket in the valve plate, press down
on the spring retainer (14) until the valve seat, valve,
and spring fall out of the bore. You may have to use a
mallet along with the valve seat remover tool.
Next, work the valve seat remover tool between the
spacer (13) and the shoulder of the valve plate bore,
again through the large hole at the bottom of the
diaphragm pocket.
Press and tap down as required, working your way
around the edge of the spacer to force the shell
subassembly, crush seal, and spacer evenly out of the
valve bore.
b. Outlet (5 outer valves). From the small hole at the
bottom of the diaphragm pocket in the valve plate, and
through the valve seat bore, press down evenly on the
valve (11) until it stops against the spring retainer.
9
D-35-SD/G-35-SD Service (Fluid End)
Reinstall the Valve Assemblies
a. Clean the valve ports, shoulders, and O-ring grooves in
the valve plate (17) with water or a compatible solvent.
A ScotchBrite™ pad or brush may be used to abrade
any old buildup or residue, but be careful not to scratch
the plastic or wear away any of the plastic valve plate
material. Rinse the valve plate after cleaning; lubricate
the valve ports and O-ring grooves with a compatible
grease, oil, or lubricating gel such as petroleum jelly.
Caution: If the elastomers are made of EPDM, do not
use a petroleum-based lubricant on them. Instead,
use an EPDM-compatible lubricant. If the product is
food-grade, use a compatible food-grade lubricant.
b. Install new O-rings (5, 6, 7) into the valve plate grooves.
c. Install new O-rings (9) and seats (8) into each valve seat
holder (10). Lubricate the O-rings.
d. Install new polyurethane washers (42, 41) into each
spring retainer recess and each valve recess,
respectively. Install the spring retainers (14) into their
shells (43) before installing the polyurethane washers in
the retainers.
A small amount of grease or petroleum jelly should be
used to help the washers stay in place during the rest of
the assembly procedure. It is very important that these
washers stay in their proper place until assembly is
completed. If they do not, they could end up holding a
valve open or clogging a valve or filter downstream of
the pump. In addition, they will not do their job of
minimizing wear of the spring retainers, springs, and
valves if they are not properly in place.
e. Install a new crush seal (44) on five of the shell
subassemblies just completed above, for use in the outlet
valves. Press the spacers (13) onto the crush seals to
create a five-piece subassembly for each outlet valve. It
is important to use new crush seals during each
rebuilding, because they hold the spacers to the shells
during subsequent assembly procedures. Using new
crush seals also ensures proper compression on the
valve assemblies when the manifold is clamped to the
valve plate.
Consult the illustration on page 8 for proper orientation
of the spring retainer tabs for both the inlet and outlet
valves.
f. Inlet (5 center valves). Insert the five remaining spacers
(13) into the inner ring of valve bores in the valve plate.
The flat, flanged end must be facing down toward the
shoulder of the valve plate.
Note: You may have to press the spacers slightly, as
there is a line-to-line fit between the outer diameter
of the spacer and the valve bore.
Next, insert the remaining crush seals (44) onto the nose
of the inlet valve spacers. The seals must fit around
the nose of the spacers.
Insert the three-piece shell subassemblies (43, 14, 42)
into the inlet valve bores. They too may have to be
pressed slightly, as there is a line-to-line fit between the
outer diameter of the shell and the valve bore. Be sure
d. Remove the valve seat (8) from its holder (10). Inspect
both parts for wear and replace either or both as
necessary. It is always a good idea to use a new valve
seat and O-ring (9) in the valve seat holder.
Note: Whenever you replace a worn valve, valve seat,
or valve spring in any valve assembly, we
recommend that you replace them in all valve
assemblies at that time, to ensure the most reliable
operation when you restart the pump. We also
recommend that you always replace the washers and
seals in the valve assemblies at that time, for the
most reliable operation. All the necessary parts are
included in a replacement valve kit and in a complete
fluid-end kit.
10
D-35-SD/G-35-SD Service (Fluid End)
the nose of the shell (43) presses into the inner diameter
of the crush seal (44). Use a 1.50-in.-diameter rod to
press down evenly on the shell subassembly to get the
proper fit.
Before continuing, check that each polyurethane washer
is in its proper place, nested down into the recess of
each spring retainer.
Insert the spacers (45) into the valve bores so that they
rest on top of the shell subassemblies. Insert the springs
(12) and valves (11), ensuring that each valve has a
polyurethane washer (41) pressed into its recess — to
minimize wear on the valve and the end of the spring.
Finally, press the valve seat subassemblies (8, 10, 9)
down into the valve bores, compressing the valve spring
slightly. The valve seat O-ring should be lubricated with
grease or petroleum jelly to ease assembly. There is
substantial interference between the O-ring and valve
bore, so be careful not to shear the O-ring by driving it in
too quickly. Use a 1.75-in.-diameter rod to push evenly
on the seat, rocking very slightly, if required, to ease the
O-ring into the bore. Push down on the valve until it hits
the stops on the spring retainer, then let it pop back up
to the seat to ensure proper operation.
g. Outlet (5 outer valves). Press the five remaining valve
seat subassemblies (8, 10, 9) into the outer ring of valve
bores in the valve plate. The flat, metal end of the valve
seat holder (10) must be facing down toward the shoulder
of the valve plate. The valve bore and O-ring should be
lubricated with grease or petroleum jelly to ease
assembly. There is substantial interference between the
O-ring and valve bore, so be careful not to shear the Oring by driving it in too quickly.
Use a 1.75-in.-diameter rod to push the seat into the
valve bore until it is flush with the plate, then use a 1.50in.-diameter rod to push down on the seats until they hit
the shoulder at the bottom of each bore.
Insert the spacers (45) into the valve bores so they rest
on top of the valve seats. Place the valves (11) and
springs (12) onto the seats, ensuring that each valve
has a polyurethane washer (41) pressed into its recess.
Finally, insert the five-piece shell subassemblies into the
bores, after checking that each polyurethane washer is
in its proper place, nested down in the recess of each
spring retainer. You may have to press slightly, as there
is a line-to-line fit between the outer diameter of the shell
and the valve bore.
From the other side of the valve plate (through the
diaphragm pocket), push on the valve until it hits the
stops on the spring retainer, then let it pop back to the
seat to ensure proper operation. You may have to lightly
hold the shell subassembly in place when doing this.
4. Inspect and Replace
Diaphragms (21)
a. Lift one of the diaphragms by one edge, and turn the
pump shaft until the diaphragm pulls up. This will expose
machined cross-holes in the valve plunger shaft behind
the diaphragm.
b. Insert an Allen wrench through one of the holes, to hold
the diaphragm up. The proper size T-handle hex wrench
is included in the Wanner Tool Kit.
c. Remove the screw (18), O-ring (19), and follower (20) in
the center of the diaphragm.
d. Remove the diaphragm and inspect it carefully. A ruptured
diaphragm generally indicates a pumping system
problem, and replacing only the diaphragm will not solve
the larger problem. Inspect the diaphragm for the
following:
• Half-moon marks. Usually caused by cavitation of the
pump (refer to “Troubleshooting”).
• Concentric circular marks. Usually caused by
cavitation of the pump (refer to “Troubleshooting”).
• Small puncture. Usually caused by a sharp foreign
object in the fluid, or by an ice particle.
• Diaphragm pulled away from the center screw or from
the cylinder sides. Usually caused by fluid being frozen
in the pump, or by overpressurization of the pump.
• Diaphragm becoming stiff and losing flexibility.
Usually caused by pumping a fluid that is incompatible
with the diaphragm material.
• Slice in ridge of diaphragm. Occurs when a
diaphragm is operated at temperatures below its rated
capability.
• Diaphragm edge chewed away. Usually caused by
overpressurizing the system.
e. Inspect the plunger (22) for any rough surfaces or edges.
Do not remove the plunger from the valve plunger (69).
Smooth the surfaces and edges as necessary with emery
cloth or a fine file.
Caution: If a diaphragm has ruptured and foreign
material or water has entered the oil reservoir, do
not operate the pump. Check all diaphragms, then
flush the reservoir completely (as outlined below)
and refill it with fresh oil. Never let the pump stand
with foreign material or water in the reservoir, or with
the reservoir empty.
f. Install a new diaphragm (or reinstall the old one, as
appropriate), ridge side out.
g. Clean and dry the screw (18), removing any oil from it.
Apply medium-strength threadlocker to the screw.
Reinstall the screw, the follower (20), and a new O-ring
(19). Tighten to 18 in.-lbs (2.0 N-m).
h. Repeat the above inspection procedure (and
replacement, if necessary) with the other four
diaphragms.
11
D-35-SD/G-35-SD Service (Fluid End)
5. Flush Contaminant from
Hydraulic End (only if a
diaphragm has ruptured)
7. Reinstall Valve Plate (17),
Manifold (4), and Manifold
Support (48)
a. Remove the oil drain cap (36) and allow all oil and
contaminant to drain out.
b. Fill the reservoir with kerosene or solvent, manually turn
the pump shaft to circulate the kerosene, and drain.
Caution: If you have EPDM diaphragms, or if food
grade oil is in the reservoir, do not use kerosene or
solvents. Instead, flush with the same lubricant that
is in the reservoir. Pumps with EPDM diaphragms
have an “E” as the 7th digit of the Model No.
c. Repeat the flushing procedure (Step b).
d. Fill the reservoir with fresh oil, manually turn the pump
shaft to circulate the oil, and drain once again.
e. Refill the reservoir. If the oil appears milky, there is still
contaminant in the reservoir. Repeat the flushing
procedure until the oil appears clean.
a. Reinstall the valve plate (17), with the valve assemblies
installed as outlined above, onto the cylinder casting.
Use the two socket-head capscrews (15) with O-rings
(16) to fasten the valve plate to the cylinder casting.
Torque to no more than 9 ft-lbs (12 N-m). Verify that the
valve assemblies and O-rings (5, 6, 7) are still in place.
b. With the manifold support and manifold nested together,
and the capscrews (46) and washers (47) in place
through the center holes, locate the drain plug (1) at the
bottom and hold the manifold and support against the
valve plate. Tighten the capscrews (46) by hand.
c. Insert all capscrews (2), washers (3), and nuts (30)
loosely. Align the outer surfaces of the valve plate,
manifold, and manifold support, and torque the
capscrews (46) to 65 ft-lbs (88 N-m).
d. Alternately tighten all capscrews (2) until secured.
Note: The valve assemblies are being compressed
by the manifold during this tightening sequence. It
is critical to compress all parts evenly.
Torque the capscrews (2) to 65 ft-lbs (88 N-m).
e. Recheck the torque on the capscrews (46).
6. Prime the Hydraulic Cells
a. With the pump horizontal and the fluid-end head
removed, fill the reservoir with the appropriate HydraOil for the application.
b. All air in the oil within the hydraulic cell (behind the
diaphragms) must be forced out by turning the shaft (and
thus pumping the piston). A shaft rotator is included in
the Wanner Tool Kit. Turn the shaft until a bubble-free
flow of oil comes from behind all the diaphragms. Watch
the oil level in the reservoir; if it gets too low during
priming, air will be drawn into the pistons (inside the
hydraulic end) and will cause the pump to run rough.
c. Wipe excess oil from the cylinder casting and
diaphragms.
8. Reinstall Inlet and Outlet
Adapters (49, 81)
a. With new O-rings (80, 82) in place on the adapters, push
each adapter into its proper bore in the manifold until
the back of the flange hits the manifold support. The holes
in the flange of each adapter should be aligned to the
tapped holes in the manifold support. Twist the adapter
as required to get proper alignment.
b. If using SAE flange adapters, reassembly of the pump
fluid end is complete.
If using NPT or BSPT adapters, fasten each adapter to
the manifold support using capscrews (83, outlet; 85,
inlet) and O-rings (84, outlet; 86, inlet). Be sure to use
one O-ring under the head of each capscrew, to prevent
damage to the plastic adapters and for proper thread
engagement in the manifold support.
c. Alternately tighten each set of capscrews (83, 85) until
all are secured. Torque the outlet adapter capscrews (83)
to no more than 15 ft-lbs (20 N-m), and the inlet adapter
capscrews (85) to no more than 20 ft-lbs (27 N-m).
12
D-35-SD/G-35-SD Service (Hydraulic End)
13
D-35-SD/G-35-SD Service (Hydraulic End)
Note: The numbers in parentheses are the Ref. Nos. on the
illustrations in the Parts Manual.
Service Procedure
This section explains how to disassemble and inspect the
hydraulic end (oil reservoir) of the pump.
1. Remove Pump Housing
a. Remove the manifold and valve plate, and the
diaphragms, from the pump. Refer to the Fluid End
Service Section.
b. Drain the oil from the pump housing by removing the
drain plug (36). Dispose of the oil properly.
c. Check the shaft for sharp burrs. Smooth any burrs, to
prevent scarring the seals (62) when removing the
shaft.
d. Reinsert two perimeter capscrews (2) through the pump
housing (37) and cylinder housing (23) from the shaft
end, at the 10 and 2 o’clock positions, to support the
parts as the pump is being disassembled. For additional
support of the cylinder housing, use an overhead lift
hooked through the eyebolt (24).
e. Install the Shaft Rotator (from the Tool Kit) over the
shaft. Push it on all the way, so the front of the Rotator
touches the pump housing. Tighten the Rotator set
screw into the keyway. This will keep the shaft assembly
(61) attached to the pump housing (37) when the
cylinder housing (23) is removed.
f. Alternately loosen the four socket-head capscrews (31)
that secure the cylinder housing (23) to the pump
housing. The piston return springs (64) will push the
cylinder housing out of the pump housing. Loosen each
screw one or two turns before going to the next one,
and continue until all four screws are removed. The
cylinder housing should now be free to slide along the
two capscrews inserted in Step “d” above. Remove the
cylinder housing assembly.
g. Remove the shaft assembly (61) by loosening the set
screw in the Shaft Rotator and sliding the shaft out of
the seals (62). The parts are heavy and you may need
a second person or a lifting device to move some of
them.
h. Remove the bearing adjustment plate (57) from the
cylinder housing. Inspect the bearing cup (61A) for wear
and replace if necessary. Removing screw (56) will
allow parts (50-56) to be removed and cleaned. Note
how the disk springs (52) are stacked, for reassembly
later. Inspect O-rings (50, 53, 55) and replace with new
ones if necessary.
i. Inspect the cam and bearings (61), and the bearing
cup (61B) in the pump housing. If the bearings are pitted
or binding, or if the bearing cup in the housing is worn,
contact Wanner Engineering.
Caution: If a bearing cup or bearing cone is
replaced, they must be replaced as a pair or
premature failure will result.
Caution: Do not disassemble the hydraulic end unless you
are a skilled mechanic. For assistance, contact Wanner
Engineering (612-332-5681) or the distributor in your area.
Caution: The four socket-head capscrews (31) that screw
through the back of the pump housing (37) into the cylinder
housing (23) hold these parts together. Do not remove these
four screws except when repairing the hydraulic end.
Note: The following service procedures refer several times
to the Wanner D-35 Tool Kit. Do not repair the hydraulic
end of the pump without using the tools in this Kit (available
from Wanner Engineering or your local distributor). Refer
also to the list of tools and supplies in the Fluid End Service
Section.
Tools and Supplies
The following additional supplies are recommended for servicing
the hydraulic end of the pump:
•
•
•
•
•
•
17 mm hex socket or box-end wrench
3/4 in. (19 mm) open-end or adjustable wrench
1 in (26 mm) open-end or adjustable wrench
Emery cloth or ScotchBrite™ pad
Grease
Anaerobic seal sealant
14
D-35-SD/G-35-SD Service (Hydraulic End)
2. Disassemble Pistons
4. Reassemble Pump Housing,
Shaft Assembly, and Cylinder
Housing
a. Place the cylinder housing assembly (23) on a clean flat
surface, with the piston feet side down.
b. With the diaphragms removed (see the Fluid End Service
Section), thread a follower screw (18) approximately
three turns into one of the valve plungers (69). Tap the
follower screw lightly with a hammer, and the plunger
(22) should slip off the valve plunger (69). Remove the
follower screw, and the hydraulic piston assembly (74)
can then be removed. Repeat this for all five cylinders.
c. Inspect and clean all parts of the hydraulic piston
assembly (74), and replace all O-rings and any other
parts that are worn or damaged. Repeat this on all five
assemblies.
d. Clean and inspect the entire cylinder housing (23) and
pump housing (37) before reassembling any pistons or
bearings into them. Contact Wanner Engineering to
discuss replacement of the cylinder housing if there is
any heavy scoring of the cylinder walls.
Note: Inspect the shaft seals (62) before continuing. If
they look damaged in any way, replace them. We
recommend changing the shaft seals whenever the
camshaft assembly is removed from the pump housing.
New shaft seals will be installed after the pump housing
has been assembled over the camshaft and fastened to
the cylinder casting (see Step 5 below). Both seals
should be replaced at the same time. Remove the seals
by pounding them out from inside the pump housing,
then clean the seal bore in the housing using emery
cloth or Scotch-Brite™.
a. With the pump housing horizontal and mounted on the
baseplate, insert the cam assembly (61) into the pump
housing. If the shaft seals (62) are still in the pump
housing (37), wrap the shaft with the Seal Protector Bag
(from the D-35 Tool Kit). Grease the bag and slide it
through the seals, then remove the bag.
Place the Shaft Rotator (from the Tool Kit) over the end
of the shaft and slide it up tight against the pump housing.
Keep the cam assembly (61) tight against the pump
housing bearing, and horizontal, and tighten the Shaft
Rotator set screw to the shaft keyway. This will hold the
cam assembly horizontal and aid in assembly.
b. Install the O-ring (63) onto the pump housing. Use grease
to aid in holding the O-ring.
c. Place the cylinder housing (23) face-down on a clean
surface.
d. Install the O-ring (50), backup washer (51), disk springs
(52), and disk spring guide (54) with O-rings (53, 55).
Be sure the disk springs are stacked correctly and the
guide is passing through the center of each one before
torquing screw (56) to 25 ft-lbs (34 N-m). Refer to the
illustration below.
3. Reassemble Pistons
Note: When reassembling the hydraulic pistons, use
new plungers (22). They are press-fit onto the valve
plungers (69) and are not reusable.
a. Drop a ball (72) into each opening in the bottom of the
piston assembly (73).
Note: using grease on the O-rings, and lubricating
the parts, will aid in assembly.
b. Insert a retaining washer (71) and O-ring (66) to hold
the balls in place.
c. Insert a valve plunger (69) into the valve cylinder (70).
Slide a spring (68) over the valve plunger (69), inside
the valve cylinder (70).
d. Insert an O-ring (67) into the spring retainer (65).
e. Install two O-rings (67) onto the valve cylinder (70).
f. Install an O-ring (66) onto the spring retainer (65).
g. Slide the assembled valve cylinder (70), valve plunger
(69), and spring (68) into the spring retainer (65).
h. Slide the complete cylinder-and-retainer assembly into
the piston assembly (73).
i. Insert a piston return spring (64) into the piston assembly.
j. Repeat the above procedure for the other four pistons.
e. Insert the bearing adjustment plate (57), with the bearing
cup (61A), dowel pin (58), and key (59), into the cylinder
housing (23).
15
D-35-SD/G-35-SD Service (Hydraulic End)
f. Insert the five piston assemblies into the cylinder housing.
Visually inspect the small holes in the foot end of each
piston to be sure that each ball (72) is in place. If any
balls are missing or not visible, remove the piston
assembly, disassemble it, and reassemble correctly.
g. To aid in assembly, insert two perimeter capscrews (2)
through the pump housing from the shaft side, at the 10
and 2 o’clock positions.
h. Pick up the cylinder housing assembly and slide it onto
the two capscrews (2) that are in the pump housing. It
will slide on until the piston feet contact the cam. Insert
up to eight more capscrews (2) through the pump housing
and cylinder housing to aid in alignment.
i. Using an 11/16 in. (17 mm) hex socket or box-end
wrench, install the four 10 mm x 100 mm fully-threaded
bolts (from the Tool Kit) through the pump housing where
the four socket-head capscrews (31) were fastened.
Tighten these four bolts evenly, and the cylinder housing
assembly should pull itself tight against the pump
housing. As you tighten the bolts, keep checking the shaft
alignment by turning it with the Shaft Rotator. If the shaft
begins to bind and becomes difficult to turn, back off on
the bolts and realign the shaft.
One at a time, remove the fully-threaded bolts and
replace them with the capscrews (31). Tighten all four
capscrews to 25 ft-lbs (34 N-m).
j. Turn the shaft once again to check its alignment, then
remove the Shaft Rotator.
c. Place a plunger on the exposed screw end of the plunger
guide lifter. The larger-diameter side of the plunger should
face the tool.
d. Screw the guide (with the plunger) into the valve plunger
(69) until tight.
e. Hold the plunger guide sleeve with a 1 in. (26 mm) openend wrench. Turn the hex nut down with a 3/4 in. (19
mm) open-end wrench to force the plunger to seat on
the valve plunger. This is a press-fit — when installed,
the plunger should be tight against the shoulder of the
valve plunger.
Note: Do not remove the plunger guide until the
diaphragm is installed (see below).
f. Install the diaphragm as outlined below, then repeat the
procedure for the other four plungers and diaphragms.
7. Reinstall Diaphragms
a. With the plunger guide tool still screwed into the valve
plunger (69), pull the valve plunger up until the crossholes in the valve plunger are exposed.
b. Insert a diaphragm Allen wrench (from the Wanner Tool
Kit), or a similar dowel-type object, through the holes —
to hold the plunger (22) away from the cylinder casting,
and to keep the valve plunger from turning when the
diaphragm is being installed.
c. Unscrew the plunger guide lifter from the valve plunger,
and place the diaphragm (21) onto the plunger (22),
ridge-side out.
d. Center the diaphragm follower (20) on the diaphragm.
e. Place the O-ring (19) onto the follower screw (18).
f. Apply a small amount of threadlocker to the threads of
the follower screw.
g. Insert the follower screw (with O-ring) through the
diaphragm follower (20) and diaphragm (21), and screw
it into the valve plunger (69).
h. Hold the diaphragm Allen wrench, and torque the follower
screw to 18 in.-lbs (2.0 N-m).
i. Repeat the above procedure for the plungers and
diaphragms of the other four cylinders.
j. Fill the reservoir with fresh oil and prime the pump, as
outlined in the Fluid End Service Section.
5. Install Shaft Seals (62)
a. Wrap the shaft with the Seal Protector Bag (from the D35 Tool Kit). Grease the bag and slide on one seal (62)
up to the pump housing.
Pack the inside (spring side) of the second seal half-full
with grease. Slide this seal on and flush against the first
seal. Make sure the outside diameters of the two seals
are clean and free of grease. Remove the protector bag
by sliding it off the shaft.
b. Apply an anaerobic seal sealant or bearing retaining
compound (such as Loctite® 601 or 609) to the outside
diameter of the seals.
Install the Shaft Rotator/Seal Inserter (from the D-35 Tool
Kit) over the shaft. Using a mallet, tap the tool to push
the two seals into the pump housing. Wipe off excess
sealant.
8. Reassemble Pump Head
Reassemble the pump head as outlined in the Fluid End
Service Section.
6. Reinstall Plungers (22)
Note: If the plungers (22) have been removed from the
valve plungers (69), do not reuse them. Install new ones
instead.
a. Rotate the pump shaft so the piston is in the top-deadcenter position.
b. With the nut turned back toward the hex head of the
plunger guide lifter, slide the plunger guide sleeve over
the large thread of the lifter (both the lifter and guide are
included in the Wanner Tool Kit).
16
D-35-SD/G-35-SD Troubleshooting
Cavitation
Pump Runs Rough
•
•
•
•
•
•
•
•
•
Inadequate fluid supply because:
— Inlet line collapsed or clogged
— Clogged line strainer
— Inlet line too small or too long
— Air leak in inlet line
— Worn or damaged inlet hose
— Suction line too long
— Too many valves and elbows in inlet line
Fluid too hot for inlet suction piping system.
Air entrained in fluid piping system.
Aeration and turbulence in supply tank.
Inlet vacuum too high (refer to “Inlet Calculations”, page 4).
•
•
•
•
•
•
•
•
Worn pump valves
Airlock in outlet system
Oil level low
Wrong weight of oil for cold operating temperatures (change
to lighter weight)
Cavitation
Air in suction line
Restriction in inlet/suction line
Hydraulic cells not primed after changing diaphragm
Foreign material in inlet or outlet valve
Damaged diaphragm
Fatigued or broken valve spring
Broken piston return spring (inside hydraulic end)
Symptoms of Cavitation
•
•
•
•
•
•
Premature Failure of Diaphragm
Excessive pump valve noise
Premature failure of spring or retainer
Volume or pressure drop
Rough-running pump
Premature failure of diaphragms
Piston return spring failure (inside hydraulic end)
•
•
•
•
•
•
•
Drop in Volume or Pressure
A drop in volume or pressure can be caused by one or more of
the following:
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•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Frozen pump
Puncture by a foreign object
Elastomer incompatible with fluid being pumped
Pump running too fast
Excess pressure
Cavitation
Broken piston return spring (64)
Water (or Process Fluid) in Oil
Reservoir
Air leak in suction piping
Clogged suction line or suction strainer
Suction line inlet above fluid level in tank
Inadequate fluid supply
Pump not operating at proper RPM
Relief valve bypassing fluid
Worn pump valve parts
Foreign material in inlet or outlet valves
Loss of oil prime in cells because of low oil level
Ruptured diaphragm
Cavitation
Warped manifold from overpressurized system
O-rings forced out of their grooves from overpressurization
Air leak in suction line strainer or gasket
Cracked suction hose.
Empty supply tank
Excessive aeration and turbulence in supply tank
Cavitation
Abrasives in the fluid
Valve incompatible with corrosives in the fluid
Pump running too fast
Worn and slipping drive belt(s)
Worn spray nozzle(s)
Cracked cylinder casting
•
•
•
•
•
•
Condensation
Ruptured diaphragm
Hydraulic cell not properly primed after diaphragm
replacement
Frozen pump
Diaphragm screw O-ring (19) missing or cracked
Cracked cylinder casting
Strong Water (or Process Fluid)
Pulsations
NOTE: Small pulsations are normal in single-acting pumps
with multiple pumping chambers.
•
•
•
•
•
•
17
Foreign object lodged in pump valve
Loss of prime in hydraulic cell because of low oil level
Air in suction line
Valve spring (12) broken
Cavitation
Aeration or turbulence in supply tank
D-35-SD/G-35-SD Troubleshooting
Valve Wear
•
•
•
•
•
•
Limited Warranty
Wanner Engineering, Inc. extends to the original purchaser
of equipment manufacturerd by it and bearing its name, a
limited one-year warranty from the date of purchase against
defects in material or workmanship, provided that the
equipment is installed and operated in accordance with
the recommendations and instructions of Wanner
Engineering, Inc. Wanner Engineering, Inc. will repair or
replace, at its option, defective parts without charge if such
parts are returned with transportation charges prepaid to
Wanner Engineering, Inc., 1204 Chestnut Avenue,
Minneapolis, Minnesota 55403.
Normal wear
Cavitation
Abrasives in the fluid
Valve incompatible with corrosives in the fluid
Pump running too fast
Washer (41) missing or dislodged from position between
spring and valve
Loss of Oil
•
•
•
•
•
•
•
External seepage
Rupture of diaphragm
Frozen pump
Diaphragm screw O-ring (19) missing or cracked
Worn shaft seal
Oil drain piping or fill cap loose
Valve plate and manifold bolts loose
This warranty does not cover:
1. The electric motors (if any), which are covered by the
separate warranties of the manufacturers of these
components.
2. Normal wear and/or damage caused by or related to
abrasion, corrosion, abuse, negligence, accident, faulty
installation or tampering in a manner which impairs normal
operation.
Premature Failure of Valve
Spring or Retainer
•
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•
•
•
•
3. Transportation costs.
This limited warranty is exclusive, and is in lieu of any other
warranties (express or implied) including warranty of
merchantability or warranty of fitness for a particular
purpose and of any noncontractual liabilities including
product liabilities based on negligence or strict liability.
Every form of liability for direct, special, incidental or
consequential damages or loss is expressly excluded and
denied.
Cavitation
Foreign object in the pump
Pump running too fast
Spring/retainer material incompatible with fluid being
pumped
Excessive inlet pressure
Washes (41, 42) missing or dislodged from position
WANNER ENGINEERING, INC.
1204 Chestnut Avenue, Minneapolis, MN 55403
TEL: (612) 332-5681 FAX: (612) 332-6937
TOLL-FREE FAX [US only]: (800) 332-6812
www.hydra-cell.com
email: [email protected]
Document Fax Back System (510) 745-0440
D35-991-2406 Rev. A
©1999 Wanner Engineering, Inc. Printed in USA 04-99
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