lhm 020

lhm 020
and
Maintenance and Service Procedure
INTRODUCTION
TASK FORCE TIP MID-MATIC AND MID-FORCE: The nozzle you have
purchased is one of your primary tools in saving life and property. It has been
manufactured with great care to give you the finest performance possible. All
components are of top quality and extremely rugged. With regular inspection
and maintenance it will serve you for many years. This publication is
intended for those who prefer to perform service on their own equipment.
Factory service is available, and repair time seldom exceeds one day in our
facility. Factory serviced nozzles are repaired by experienced workmen, fully
tested and promptly returned functioning to original specifications. Task
Force Tips assumes no liability for damage to equipment or injury to
personnel that is a result of user service.
GENERAL INFORMATION
TOOLS REQUIRED
The following tools are required for general service to the nozzle:
3/32, 1/8, 3/16, 7/32 and 5/16 Allen Wrenches
9/16 box or open end wrench
Dow #44 high temperature silicone grease
Loctite #271 thread locker or equivalent
oxyacetylene torch
razor knife
Additional tools needed to service the shaper are:
strap wrench
vise with padded jaws
Mid-Matic shaper removal clamp
(special tool TFT #THM-500)
Mid-Force shaper removal clamp
(special tool TFT #THMD-500)
Additional tools needed to service the pressure control are:
dental pick
two small probes, approximately 1/16 dia
(such as a drill bit)
drill press, 15 inch opening
shaft wrench (special tool TFT item #THM-570 )
Smalley Ring removal tool
(special tool TFT item #THM-561 )
THREADED JOINTS: Threaded joints have been secured using Loctite
brand thread locking adhesive #271. Disassembly of joints where #271
Loctite was used requires a minimal application of heat with a oxyacetylene
torch to break the bond. The threads should be heated to approximately 450
degrees F. Excessive heat application will cause damage to adjacent seals
and labels. Replacement parts must be reinstalled using Loctite #271 or
equivalent. Theads musts be clean, dry, and free of grease or oil when
applying Loctite. Allow Loctite to set up for at least one hour before using or
subjecting to water. Small vials of Loctite for field service are available; order
part # V5010 (#271 LOCTITE MINI DISPENSER).
LUBRICANTS: If parts are disassembled in an area where o-rings are
present, re-assemble using DOW #44 High Temperature Silicone Grease on
all o-rings and surfaces that the o-rings contact. If nozzle is not disassembled
refer to field lubrication procedure. (on back)
LABEL REPLACEMENT: If labels become damaged, remove old labels with
razor knife. Remove adhesive with acetone or methyl ethyl ketone. Surface
must be clean, dry, and free from grease. Remove protective backing and
carefully apply new label.
ORDERING PARTS: Always specify the serial number of the nozzle when
ordering parts. The serial number is found on the back of the nozzle next to
the coupling. Be sure to use complete DESCRIPTION and ORDER #, as
printed on parts list. All requests for couplings must specify thread size.
Pricing information will be given at time of order.
COUPLING SERVICE PROCEDURE
GENERAL: Occasional replacement of hose gaskets is recommended.
Replace GASKET GRABBER (8) if severe impact from debris has caused
damage. Coupling service kits which include all hardware and Loctite are
available. Couplings with special or standard threads are available and may
be exchanged on new nozzles. Please specify desired threads when
ordering.
COUPLING REMOVAL: All couplings are retained with a ball race and set
screw. Heat and remove the SOCKET SET SCREW (6 or 7) from coupling
using an 1/8" Allen wrench. Turn coupling so that hole faces down, and rotate
coupling back and forth to allow the 3/16 STAINLESS STEEL BALLS (5) to
drop out. When all balls are out of the groove, the coupling can be removed.
V OR VPGI COUPLING INSTALLATION: Inspect and if necessary replace
the 134 O-RING (9). Grease and install the o-ring onto the VALVE BODY (10).
Insert the GASKET GRABBER (8) debris screen onto the valve body with the
raised end pointing toward the front of the nozzle. Put the coupling onto the
valve body and load 34 BALLS (5) into the ball groove. Insertion of the balls is
easier if the coupling is rotated slightly back and forth as the balls are loaded.
Use Loctite #271 and install the SOCKET SET SCREW (6). The set screw
should be flush with the surface of the coupling. If the coupling is difficult to
turn, or feels rough when turned, the set screw is in too far. Back set screw off
and try again. If the feel is still not correct, recheck the number of balls in the
coupling.
TIP ONLY COUPLING INSTALLATION: The coupling installation procedure
for Tip Only models is the same as the above procedure except that only 33
balls and a longer SET SCREW (7) are used. Run the set screw into the small
slot on the male ball groove of the TAIL PIECE or BASE (26 or 40) until it
bottoms out without applying pressure. This locks the coupling on Tip Only
models from rotation.
SEPARATING FRONT END FROM BACK: On models with valves, heat the
two SET SCREWS (19) and remove with a 3/32 Allen wrench. Then unscrew
the front end from the valve assembly. To reassemble see section on VALVE
SHUTOFF ADJUSTMENT.
On Tip Only models (no valve) the TIP ONLY BASE (40) is retained on the
nozzle front end by threads which are retained by Loctite #271. Apply heat at
the knurled rib nearest the front of the nozzle. Damage to seals and labels
can be reduced by protecting these with a wet rag. The TIP ONLY BASE (40)
can now be unscrewed. Remove and replace 139 O-RING (46). To
reassemble, clean all threads, apply Loctite and screw together.
BOLT ON PISTOL GRIP SERVICE: PISTOL GRIP (44) is held on by a
SCREW (45). Remove screw with a 5/16 Allen wrench. To reinstall, clean
thread and apply Loctite #271. Tighten screw to 20 FT-LBS.
VALVE SERVICE PROCEDURE
VALVE PLUG REPLACEMENT: After removing back end (see section on
Separating Front End From Back), VALVE PLUG (23, 39, or 41) is removed by
pulling straight back. New valve plug is installed by pushing in with finger
pressure.
V OR VPGI VALVE DISASSEMBLY SEQUENCE
HANDLE REMOVAL: Heat and then remove both BUTTON HEAD CAP
SCREWS (14) from VALVE HANDLE (11) using a 7/32 Allen wrench. Slide
CAM and SAFETY PINS (15 and 16) out of handle by gently hitting nozzle
against palm of hand. To remove handle, pull upwards while containing the
DETENT BALLS (13) and SPRINGS (12) to prevent their loss. Service to
interior valve parts should be done prior to reinstalling handle.
SLIDER AND SEAL REMOVAL: Refering to appropriate sections remove
the handle and front end from valve assembly. With handle and front end
removed the SLIDER (22) can be pulled out from front of valve. Remove and
inspect O-RINGS (20, 21 and 46). Replace o-rings if they are damaged.
V OR VPGI VALVE ASSEMBLY SEQUENCE
SLIDER AND SEAL INSTALLATION: Insert O-RINGS (20, 21 and 46) into
the proper grooves in the valve body. Check SLIDER (22) for any raised metal
at groove area. Replace if necessary. Lubricate o-rings and slider with
silicone grease. Push slider into the valve body.
HANDLE INSTALLATION: Insert DETENT SPRINGS (12) and DETENT
BALLS (13) into the handle lugs. While holding balls in place snap the
HANDLE (11) onto valve body with offset holes FORWARD. Carefully align
the groove on SLIDER (22) with offset hole in valve discs and offset hole in
handle. Start SAFETY PIN (16) into offset hole in handle. Push down into
engagement with groove in slider, until head of pin is flush with handle.
Repeat procedure for CAM PIN (15). Apply Loctite #271 to both BUTTON
HEAD SCREWS (14) and insert through lower handle holes. Thread each
into corresponding center disk hole. Tighten button head screw securely.
Cycle handle and check that it snaps firmly and smoothly into all detent
positions and that slider moves back and forth.
VALVE SHUTOFF ADJUSTMENT: Shutoff valve is adjusted by the threads
between the valve body and the front portion of the nozzle. While holding the
VALVE HANDLE (11) against stops in the OFF position, screw front end into
the valve body until contact is made with the valve plug. Open handle up to
remove contact. Screw the front end in 1/12 turn further to give the valve
shutoff compression. Apply Loctite to SET SCREWS (19). Thread in both set
screws until they bottom out, without applying pressure. In an alternating
fashion continue turning in set screws until tight.
VALVE ADJUSTMENT FOR SEVERE COLD: To help prevent hose line
freezing in cold climates, the valve may be adjusted for intentional leakage
by unscrewing front end slightly. The valve can be returned to normal
adjustment for complete shut off during warm weather by following the
precedure in the last section.
TWIST TYPE VALVE SERVICE PROCEDURE
STO SLEEVE SERVICE: To remove the STO SLEEVE (36), first heat and
remove the CAM SCREWS (38) and DETENT SCREWS (37). The detent
screws contain SPRINGS (34) and BALLS (35). STO SLEEVE (36) is then
removed by sliding forward. Inspect O-RINGS (30) and replace if damaged.
Installation is reverse of removal. Before reassembly grease o-rings. Clean
screw threads and apply Loctite #271.
STO VALVE SERVICE: Heat the back end of the STO BASE (33) with a torch
and unscrew the STO TAIL PIECE (26). The STO SLIDER (29) may now be
removed. Inspect and replace any damaged O-RINGS (27, 28 and 46).
Grease o-rings, clean threads and use Loctite #271 upon reassembly.
SHAPER SERVICE PROCEDURE
SHAPER REMOVAL: The rubber bumper is permanently bonded onto the
stream shaper as a single unit the SHAPER (63). The shaper is attached to
the SHAPER GUIDE (47 OR 50) by a threaded joint that is retained by Loctite
#271. Grip rear portion of the nozzle in a vise with padded jaws. Or clamp
SHAPER GUIDE (47 or 50) using TFT special tool THM-500 (for MID-MATIC)
or THMD-500 (for MID-FORCE) held in a vise. Direct a hot narrow flame
around the rear portion of the shaper. Heat for approximately 20 seconds,
being careful not to damage the bumper or labels (a wet rag wrapped around
these areas will help). Use a strap wrench to unscrew the shaper from the
shaper guide. Remove the shaper. Inside the shaper are 64, 1/8 NYLON
BALLS (61), some of which may fall free as it is removed. If shaper is to be reused, clean ball track and replace 230 O-RING (62) if damaged.
SHAPER INSTALLATION: Install 230 O-RING (62) in front groove of
SHAPER (63). Grease the seal and ball groove heavily. Place 64, 1/8 NYLON
BALLS (61) into greased ball groove. Apply Loctite #271 to male thread on
SHAPER GUIDE (47 or 50). Start shaper onto SHAPER GUIDE threads. Place
three SHAPER GUIDE BALLS (52) into the grooves on barrel and screw
down shaper until threads bottom out.
PRESSURE CONTROL SERVICE PROCEDURE
MID-FORCE KNOB REMOVAL: To remove the MID-FORCE KNOB (79)
from the BAFFLE (69):
1) Turn knob to standard setting.
2) Turn the SHAPER (63) back to full flush.
3) Insert a small probe (such as a drill bit) into each of the two 3/32
holeson the sides of the knob. (not the 1/8 holes in the face of the
knob)
4) Simultaneously push in on each of the two probes (this disengages
the spring loaded pawls) while turning knob clockwise (when
viewed from the front). Once knob turns a little, the probes may be
removed.
5) Turn knob clockwise until it hits a stop. (about 25 degrees)
6) Pull knob to remove from baffle.
www.tf t.com
MID-FORCE KNOB INSTALLATION:
1) Clean SPRING PLATE (77) of any dirt or oil.
2) Peel off backing and apply LABEL (78) to spring plate as shown
in figure 1. (on page 4)
3) Place spring plate with label attached into knob as shown in
figure 2. (on page 4)
4) Assure that O-RINGS (70) on baffle are in good condition. Apply
grease to o-rings on baffle.
5) Place knob assembly from step 3 onto baffle. Assure that
notches on spring plate are around the bosses on the baffle.
Turn knob counter clockwise about 25 degrees to lock in place.
6) Check for smooth operation between standard and emergency
settings.
BAFFLE REMOVAL: Note: To remove the BAFFLE (69) on MID-FORCE
models the KNOB (79) must first be removed (see section on knob removal).
Place nozzle in drill press with coupling end down. Place TFT special tool
THM-561 (Smalley Ring removal tool) on SUB-BAFFLE (75) and use drill
press to push in the spring loaded sub-baffle (about 45 pounds force) to
expose the SMALLEY RING (76). Use dental pick to remove Smalley Ring
from SHAFT (66). Slowly release pressure on sub-baffle to decompress
SPRING (71 or 72). Pull out BAFFLE (68 or 69) and spring. NOTE: Free length
of spring is about 1-1/2 inches longer then it’s installed length.
SHAFT REMOVAL: To remove the SHAFT (66) first separate the front end
from the nozzle, then remove the VALVE PLUG (23, 39 or 41). Loosen and
remove the shaft locking SCREW (64) with a 3/16 allen wrench. Insert a 7/32
Allen wrench into the front of the shaft and screw the shaft out of the barrel
assembly. Or with the baffle removed TFT special tool TMH570 (shaft
removal tool) may be used. This special tool gives increased torque
capability in cases when the 7/32 Allen wrench may strip out. LOCKING
SLEEVE (65) is removed by pushing it forward and out of BARREL
ASSEMBLY (53 or 54) with a punch. Note: LOCKING SLEEVE may require
light tapping with a hammer to remove.
BAFFLE INSTALLATION: Grease and install SHAFT SPLIT SEAL (67) into
groove in shaft. Grease bores at both ends of BAFFLE (68 or 69) and install
on SHAFT (66). IMPORTANT: MID-FORCE BAFFLE (69) MUST ENGAGE
FLATS ON SHAFT TO LOCK ROTATION. Place SPRING (71 or 72) into
BAFFLE. Replace any damaged O-RINGS (73 or 74) on SUB-BAFFLE (75).
Grease o-rings and place sub-baffle on spring with counterbore facing away
from the spring. Use drill press and TFT special tool THM-561 (Smalley Ring
Removal Tool) to compress spring until sub-baffle is below Smalley Ring
groove on SHAFT (66). Install SMALLEY RING (76) into shaft groove and
slowly remove force from press. Assure that Smalley Ring is fully seated and
that counterbore on sub-baffle captures it.
SHAFT INSTALLATION AND INITIAL OPENING ADJUSTMENT: To install
and adjust the SHAFT (66), first assemble PRESSURE CONTROL PARTS (67
thru 79) to shaft (see baffle and Mid-Force knob installation sections). Place
LOCKING SLEEVE (65) with hollow end forward into front of barrel assembly
and push in far enough so that it does not interfere when installing shaft.
Note: If old LOCKING SLEEVE is reused it may require light tapping with a
hammer and punch to install. Screw shaft (with pressure control parts
installed) into barrel assembly. Insert a 7/32 Allen wrench into front of shaft
and turn in until baffle just touches BARREL CONE (60) then turn back 3/8
turn for 100 PSI nozzles or 3/4 turn for 75 PSI nozzles. Keep Allen wrench in
shaft to assure that shaft dosen’t turn and install SCREW (64) with #271
Loctite and tighten screw to approximately 75 in-lbs. IMPORTANT: Let loctite
set for at least one hour before using or subjecting to water. Always flow test
after adjusting. Nozzle pressure and flow requirements are shown on the
following table:
NOZZLE PRESSURE
AT 70 GPM
100 PSI MODEL
85 PSI
75 PSI MODEL
70 PSI
NOZZLE PRESSURE
AT 200 GPM
105 PSI
80 PSI
PRESSURE CONTROL REPLACEMENT: The pressure control may be
removed and replaced as a unit by following the procedure in the SHAFT
REMOVAL and INSTALLATION sections.
PROBLEMS:
If you have any questions or problems, please call for assistance.
(800) 348-2686 • (219) 462-6161 • FAX (219) 464-0620
TASK FORCE TIPS INC. - www.tft.com
2800 East Evans Avenue • V alparaiso, IN 46383-6940
LHM-020 December 3, 2001 Rev 1
17
11
BACK END
PARTS
15
18
16
12
14
13
22
20
10
23
COUPLINGS
46
21
19
43
5
VALVE PARTS
45
6
(34 PCS)
44
9
4
31
1
35
32
37
30
30
28
38
8
27
26
3
33
5
19
36
TWIST TYPE VALVE PARTS
7
(33 PCS)
39
34
29
9
1
2
40
8
41
TIP ONLY BASE PARTS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
DESCRIPTION
1.5" COUPLING GASKET
1.5" ROCKER LUG COUPLING
1.5" BSP STRETCH COUPLING
2.5" BIC COUPLING
3/16 SS BALLS
1/4-28 x 3/16 SOCKET SET SCREW
1/4-28 x 3/8 SOCKET SET SCREW
GASKET GRABBER
O-RING 134
VALVE ASSEMBLY
VALVE HANDLE
DETENT SPRING
DETENT BALL
HANDLE SCREW
CAM PIN
SAFETY PIN
VALVE HANDLE COVER
8-32 x 3/8 BH CAP SCREW
10-32 x 3/16 SOCKET SET SCREW
QUADX-4221
QUADX-4130
SLIDER
QTY
1
1
1
1
34
1
1
1
1
1
1
2
2
2
1
1
2
4
2
1
1
1
ORDER #
V3130
HM697*
HM685B
HM687
V2120
V1110
V1100
HM730
V3410-134
HM910
HM620
HM770
VB243TO
HM645
HM630
HM635
HM625-BLK
VT08-32BH375
V1080
VOQ-4221
VOQ-4130
HM660
23
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
43
44
45
46
47
DESCRIPTION
VALVE PLUG
S.T.O. TAIL PIECE
O-RING 129
O-RING 138
S.T.O. SLIDER
QUADX-4037
“OFF” LABEL
“ON” LABEL
S.T.O. BASE
DETENT SPRING
3/16" TORLON BALLS
S.T.O. SLEEVE
DETENT SCREW
CAM SCREW
S.T.O. VALVE PLUG
T.O. BASE
T.O. VALVE PLUG
3/8-24 x 3/8 SOCKET SET SCREW
PISTOL GRIP
3/8-24 x 1-1/4 SH CAP SCREW
O-RING 139
SHAPER GUIDE
QTY
1
1
1
1
1
2
1
1
1
2
2
1
2
2
1
1
1
1
1
1
1
1
ORDER #
HM590
HM662
V3750-129
V3420-138
HM661
VOQ-4037
HD755
HD750
HM655
VM4200
V2120-TORLON
HM668
HD785
HD780
HM592
HM670
HM591
VT37-24SS375
HM690
VT37-24SH1.2
V3700-139
HM510
FRONT END PARTS
REPAIR KITS
STANDARD CONTROL UNIT
MID-FORCE CONTROL UNIT
75 PSI CONTROL UNIT
STANDARD SHUT-OFF
TIP-ONLY WITH SHUT-OFF
COUPLING - NST REPAIR KIT
COUPLING - IPT REPAIR KIT
PISTOL GRIP PACK
RED HANDLE COVER KIT
GREEN HANDLE COVER KIT
BLUE HANDLE COVER KIT
BLACK HANDLE COVER KIT
ORANGE HANDLE COVER KIT
WHITE HANDLE COVER KIT
YELLOW HANDLE COVER KIT
SPECIAL TOOLS
MID-MATIC SHAPER REMOVALCLAMP
SHAFT REMOVAL TOOL
SMALLEY RING REMOVAL TOOL
MID-FORCE SHAPER REMOVALCLAMP
SPRAY ADJUSTMENT PARTS
52
47
53
58
48 or 49
55
50
54
57
51
61
60
52
63
62
59
56
PRESSURE CONTROL PARTS
Attach label to this side
Spring plate
with label
HM840-KIT
HMD840-KIT
HM840-75-KIT
HM590-KIT
HM592-KIT
HM997N-KIT
HM997I-KIT
HM690-KIT
HM925RED-KIT
HM925GRN-KIT
HM925BLU-KIT
HM925BLK-KIT
HM925ORG-KIT
HM925WHT-KIT
HM925YEL-KIT
THM-500
THM-570
THM-561
THMD-500
Pawl in this detent
68
72
66
64
76
73
Align notches
75 PSI
79
100 PSI
65
67
71
69
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
74
DESCRIPTION
NAME LABEL - 100 PSI
NAME LABEL - 75 PSI
MID-FORCE SHAPER GUIDE
MID-FORCE NAME LABEL
GUIDE BALLS
BARREL ASSEMBLY
MID-FORCE BARREL ASSEMBLY
BARREL LABEL
(Included in HM810 Assembly)
MID-FORCE BARREL LABEL
(Included in HM810 Assembly)
O-RING 030
WS-175-S02 SMALLEY RING
FLUSH WAVE SPRING
BARREL CONE
1/8 NYLON BALL
O RING 230
77
QTY
1
1
1
1
3
1
1
ORDER #
HM745
HM745L
HMD510
HMD745
VB243TO
HM805
HMD805
1
HM740
1
1
1
1
1
64
1
HMD740
V3000-030
VR4230
HM78
HM520
V2135
VO-230
Attaching Label to Spring Plate
Back View of Mid-Force Knob
with Spring Plate Installed
FIGURE 1
FIGURE 2
TASK FORCE TIPS, INC
75
70
Ears align with shallow
notch on spring plate
78
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
2800 East Evans Avenue
Valparaiso, IN 46383-6940
24-Hour Service Hot-line
800-348-2686 • www.tft.com
DESCRIPTION
SHAPER WITH BUMPER
1/4-28 x 3/4 SH CAP SCREW
LOCKING SLEEVE
SHAFT
SHAFT SPLIT SEAL
BAFFLE
MID-FORCE BAFFLE
O RING 004
CONTROL SPRING - 100 PSI
CONTROL SPRING - 75 PSI
O RING 014
O RING 025
SUB BAFFLE
WST-46-S02 SMALLEY RING
SPRING PLATE
MID-FORCE BAFFLE LABEL
KNOB
QTY
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
ORDER #
HM500
VT25-28SH750
HM571
HM570
HM575
HM561
HMD561
VO-004
HM760
HM761
V3610-014
VO-025
HM562
VR4225
HM555
HMD752
HMD560
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