Bypass Servo Assembly 2691786 Series

Maintenance Manual
Bypass Servo Assembly
2691786 Series
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
LIST OF EFFECTIVE PAGES
On a revised page, the portion of text or illustrations affected by the change is indicated by a vertical line in the outer margin of the page. When a revision is issued, the entire document is reissued
with the current revision number and date shown on all pages. For major revisions, the basic number is incremented. For minor revisions, the number following the decimal is incremented. Dates of
issue for original and subsequent revisions are as follows:
Original 1.0 03/15/2003
Revision 1.1 02/01/2006
The total number of pages in this technical document is 22 consisting of the following:
Title, 2 – 22
TABLE OF CONTENTS
SUBJECT
PAGE
Introduction
Description and Operation
Fault Isolation
Disassembly
Cleaning
Inspection
Repair
Assembly
Illustrated Parts List
3
3
8
10
11
12
13
13
16
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
INTRODUCTION
1. General
This manual provides component maintenance shop instructions for the Bypass Servo Assembly
(servo).
2. Revision Service
This manual will be revised as necessary to show the current information.
3. Weights and Measurements
Weights and measurements in this manual are expressed in both English (U.S. customary) and
selected Metric (SI) units.
DESCRIPTION AND OPERATION
1. Description
The Bypass Servo Assembly (servo) (see Figure 1) provides the means of controlling a fuel bypass
regulator. There are two versions, air-set and spring-set. The bypass regulator will maintain a
constant pressure at a downstream sensing point, such as a venturi, as a function of the supplied
reference air or adjustable spring pressure. The bypass regulator is normally mounted in the pump
bypass line and regulates the flow from the outlet to the inlet of the pump.
2. Operation – Air-Set Servo (See Figure 2)
A. Fuel Bypass Valve Open
With reference air pressure less than the bias pressure (25 psi [1,7 bar]) the control poppet is
open. This allows the upstream pressure through the servo and downstream. Upstream
pressure keeps the main valve piston in the open position, allowing full pump pressure to
bypass to the inlet side of the pump.
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Maintenance Manual
Bypass Servo Assembly – 2691786 Series
B. Controlling the Main Valve
When regulated reference air pressure (25 psi [1,7 bar]) higher than the desired controlling
pressure is applied, the control poppet closes. This applies the upstream fuel pressure to the
back side of the main valve piston, closing the valve. The valve remains in the closed position
until a fuel sense signal (from a downstream source such as a venturi) starts opening the
control poppet and allowing fuel pressure to bleed from the back side of the main valve piston.
3. Operation – Spring-Set Servo (See Figure 3)
A. Main Valve Closed
With no pressure applied to the pilot (air or electrical solenoid), upstream pressure passes
through the servo and downstream. Upstream pressure keeps the main valve piston in the
open position, allowing full pump pressure to bypass to the inlet side of the pump.
B. Controlling the Main Valve
When the pilot is activated (air or electrical solenoid), upstream pressure can no longer bleed
downstream. The control poppet is closed (spring force) and upstream pressure is applied to
the back side of the main valve piston, closing the valve. The valve remains in the closed
position until a fuel sense signal (from a downstream source such as a venturi) starts opening
the control poppet and allowing fuel pressure to bleed from the back side of the main valve
piston.
C. Main Valve Closing
Deactivating the pilot (air or electrical solenoid) will allow upstream pressure to pass through
the servo downstream. This bleeds the pressure behind the main valve piston, allowing it to
open fully.
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
4. Leading Particulars (Refer to Table 1)
Table 1. Leading Particulars
Service Automotive and Aviation Fuels
Operating Pressure (maximum) 120 psi (8,2 bar)
Fluid Temperature –40 to 165°F (–54 to 74°C)
Ambient Temperature –40 to 165°F (–54 to 74°C)
Weight (approximate)
Aluminum Alloy Body 1.3 pounds (0,6 kg)
Stainless Steel Body (Mod D) 4.4 pounds (2,0 kg)
5. Model Variations
A. Air-Set Servo
The 2691786C or 2691786G series air-set servo has an aluminum body and provides for air-set
control with 25 psi control pressure bias. Refer to Table 2 for the available air-set servo variations.
Table 2. Air-Set Servo Variations
SERVO
DESCRIPTION
MOD LETTERS
Basic
C
D
E
G
Air-set regulation, control pressure bias of 25 psi (1,7 bar), aluminum alloy body
4-inch main valve bypass control
Changes body to stainless steel
Adds pressure limiting pilot valve, P/N 2706142-101
3-inch main valve bypass control
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
B. Spring-Set Servo
The 2691786H or 2691786J series air-set servo has a stainless steel body and provides for springset control. Refer to Table 3 for the available spring-set servo variations.
Table 3. Spring-Set Servo Variations
SERVO
DESCRIPTION
MOD LETTERS
Basic H
D
E
J
4-inch main valve spring-set bypass servo, 20 to 75 psi (1,4 to 5,1 bar)
Changes body to stainless steel
Adds pressure limiting pilot valve, P/N 2706142-101
3-inch main valve spring-set bypass servo, 20 to 75 psi (1,4 to 5,1 bar)
FAULT ISOLATION
1. General
A. Examine the servo to verify completeness of assembly, cleanliness, correct identification, and
that no obvious damage is evident.
B. Visually verify that all markings and nomenclature are complete and legible.
C. Refer to Table 4 for fault isolation information. Locate suspected faulty component and take
appropriate remedial action.
D. All normal rules and procedures associated with good safety practices during performance of
fault isolation must be observed and implemented at all times.
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
Table 4. Fault Isolation
FAULT
Main valve will
not close
POSSIBLE CAUSE
CORRECTIVE ACTION
Insufficient air pressure
Check for the correct pressure at the
servo AIR port.
Remove the blockage.
Check the auxiliary servo for correct
operation.
Overhaul the servo
Overhaul the servo.
Fuel sense line blocked
Defective auxiliary servo
Main valve is
partially closed
and will not
regulate
Main valve is
partially closed
and will not regulate (continued)
Main valve open
but regulated
pressure is high
Seat (7) contaminated or damaged
Poppet (2B) or piston (5A) jammed
by contamination
Seat (7) contaminated or damaged
Defective relief valve
Overhaul the servo
Check the relief valve for correct
operation.
Service the main valve.
Overhaul the servo.
Main valve contaminated
Poppet (2) or piston (5) jammed by
contamination
Fuel sense line leakage
Locate and repair the leak.
Main valve open
but regulated
pressure is low
Insufficient pump pressure
Check pump capacity.
Air-to-fuel or fuel
to air contamination
Worn or damaged packings or seals
Other contamination sources in
system
Overhaul the servo.
Check and correct as necessary.
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
Table 4. Fault Isolation (continued)
FAULT
Leakage at
servo/main valve
interface
Leakage from cap
end of servo
Servo will not
operate
POSSIBLE CAUSE
CORRECTIVE ACTION
Mounting screws loose
Tighten the screws evenly and
securely.
Replace the packings.
Replace the packings and the orifice.
Damaged or missing packings (13)
Incorrectly installed packings (13)
or orifice (31)
Leakage from the bolt (19) or the
plugs (17 or 24)
Tighten the bolt or the plugs. If necessary, remove and reseal the plugs.
Worn or damaged packings (12)
Replace the packings.
Damaged spring or piston
Overhaul the servo. Replace the
damaged parts.
DISASSEMBLY
1. Replacement Parts Kits
Refer to the IPL section for information on the replacement parts kits.
2. Disassembling the Air-Set Bypass Servo Assembly (Refer to IPL Figure 1)
A. Remove the retaining ring (16) and the cap (3) from the servo body (1 or 1A).
B. Remove the E-ring (14), the piston (5), the spring (4) and the shim(s) (33) from the servo
body (1 or 1A). Note the quantity of washers for reassembly reference. Remove the packings
(12) from the servo body.
C. Remove the E-ring (14) from the poppet (2). Slide the guide (6) off of the poppet. Remove
the packings (9 and 11) from the poppet and the guide.
D. Remove the seat (7) from the servo body (1 or 1A). Remove the packing (10) from the
packing groove of the seat.
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
E. Remove the bolt (19) and the washer (20) from the servo body (1 or 1A).
F. Do not remove the plugs (17 or 24) from the servo body (1 or 1A) unless there has been
leakage around them.
3. Disassembling the Spring-Set Bypass Servo Assembly (Refer to IPL Figure 2)
A. Remove the screw (37) and the washer (36), and back out the setscrew (38) from the cap
(34) until the spring pressure is released.
B. Remove the retaining ring (16) and the cap (34) from the servo body (1 or 1A).
C. Remove the retainer (39) and the spring (35) from the servo body (1 or 1A).
D. Remove the retaining ring (14). Pull the poppet (40) from the servo body (1 or 1A).
E. Remove the retaining ring (15). Pull the poppet (2) and the guide (6) from the servo body (1
or 1A).
F. Remove the E-ring (14) from the poppet (40). Slide the guide (6) off of the poppet. Remove
the packings (9 and 11) from the poppet and the guide.
G. Remove the seat (7) from the servo body (1 or 1A). Remove the packing (10) from the
packing groove of the seat.
H. Remove the bolt (19) and the washer (20) from the servo body (1 or 1A).
I. Do not remove the plugs (17 or 24) from the servo body (1 or 1A) unless there has been
leakage around them.
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
CLEANING
1. Cleaning Materials
Refer to Table 4 for recommended cleaning materials. Suitable equivalent cleaning materials may
be substituted for the items listed.
2. Cleaning Procedures
WARNING: DRY CLEANING SOLVENT IS FLAMMABLE AND TOXIC TO EYES, SKIN, AND
RESPIRATORY TRACT. SKIN/EYE PROTECTION REQUIRED. AVOID
REPEATED/PROLONGED CONTACT. USE ONLY IN WELL VENTILATED AREAS. GOOD
GENERAL VENTILATION IS NORMALLY ADEQUATE. KEEP AWAY FROM OPEN FLAMES OR
OTHER IGNITION SOURCES.
Table 4. Recommended Cleaning Materials
DESCRIPTION
Brush, Bristle, stiff,
nonmetallic
Dry Cleaning Solvent
Pick, Teflon
Plastic Bags
Tissues, lint-free
SPECIFICATION
SOURCE
– – Commercially available
P-D-680, Type 2
– – – – – – Commercially available
Commercially available
Commercially available
Commercially available
A. Clean all metal parts by washing thoroughly in dry cleaning solvent. Remove stubborn
deposits by scrubbing with a nonmetallic stiff bristle brush. Use a Teflon pick to remove
obstructions from ports, grooves and passages.
NOTE: All of the parts must be free of corrosion, dirt, grease, oil, or any other foreign matter.
WARNING: WEAR EYE PROTECTION WHEN DRYING PARTS WITH COMPRESSED
AIR.DO NOT DIRECT AIRSTREAM AT PERSONNEL OR LIGHT METAL PARTS.
B. Dry parts with clean lint-free tissues or clean, dry compressed air.
C. Package clean parts in plastic bags.
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
INSPECTION
1. General
A. Under strong light and magnification, visually check all parts in accordance with the general
criteria specified in paragraph 2 below.
B. Repair minor damage in accordance with local standard procedures. If damage is major or
beyond simple repair, replace the part rather than attempt any extensive repairs.
2. Component Checks (Refer to Table 5)
Table 5. Component Checks
DESCRIPTION
(IPL Figure and Item No.)
General
Servo Body (1-1, 11A, 2-1 or 2-1A)
Poppet (1-2 or 2-40)
Piston (1-5 or 2-5)
Compression Spring
(1-4)
Compression Spring
(2-35)
CHECK CRITERIA
1) Visually check all parts as applicable for nicks, cracks, cuts, burrs,
corrosion, breaks, scoring, deformation, dents, thread damage, or any
other obvious defects.
2) Make sure that the ports, passages, recesses and sealing grooves are
clean and unobstructed.
3) Check all sealing and seating surfaces for damage or corrosion which
would affect sealing.
Check for:
1) Scoring on the large bore inside diameter.
2) Scoring on the seal groove surfaces for the packings.
Minor damage may be repaired. Replace an aluminum body if bare
metal shows through the anodized surfaces. Replace the body if there is
extensive scoring, corrosion or other damage.
Replace poppet if the seat face or the stem is worn, scored or corroded.
Replace the piston if there is scoring on the outside diameters of the
piston body.
Check for:
1) Deformation or permanent set.
2) Free length of approximately 1.19 inch (30,2 mm).
Check for:
1) Deformation or permanent set.
2) Free length of approximately 1.845 inch (46,9 mm).
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
REPAIR
1. General
Repairs normally will consist of replacing damaged or malfunctioning parts with new parts, however,
this section outlines minor repair procedures permissible for component parts, and specifies mandatory replacement parts.
2. Repair Materials
Refer to Table 6 for recommended repair materials. Suitable equivalent repair materials may be
substituted for the items listed.
Table 6. Recommended Repair Materials
DESCRIPTION
Cloth, Abrasive, Crocus, 600-grit
SPECIFICATION
SOURCE
P-C-458
Commercially available
3. Repair or Replacement
A. Replace all parts which are obviously cracked, worn, deformed, damaged beyond repair, or
which do not meet check requirements and cannot be restored to serviceable condition by
allowable repair.
B. Polish out minor corrosion and surface damage on stainless steel parts with crocus abrasive
cloth.
C. Polish out minor scoring on the poppet and the piston with crocus abrasive cloth.
D. After polishing, re-clean parts as specified in the CLEANING section.
E. Clear minor thread damage with a thread restoring tool; replace all threaded components
having crossed or stripped threads.
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
ASSEMBLY
1. Replacement Parts
Refer to the IPL section for information on the replacement parts kits.
2. Assembly Materials
Refer to Table 7 for recommended assembly materials. Suitable equivalent materials may be substituted for the items listed.
3. Lubrication
Prior to assembly, LIGHTLY lubricate all of the packings and seals with silicone grease (DC1292).
Table 7. Recommended Assembly Materials
DESCRIPTION
SPECIFICATION
– Masking Tape
Sealant, Pipe Thread
SWAK
Silicone Grease
DC1292
SOURCE
Commercially available
Swagelok Corporation
29500 Solon Road
Solon, Ohio 44139
Dow Corning Corporation
2200 West Salzburg Road
Auburn, Michigan 48611
Voice Telephone: 517-496-4388
Fax Telephone: 517-496-5324
4. Assembling the Air-Set Servo Assembly (Refer to IPL Figure 1)
CAUTION: DO NOT USE TEFLON TAPE ON THE THREADS OF THE PLUG.
A. If a plug (17 or 24) has been removed, apply a small bead of pipe thread sealant (SWAK)
around the threads at the small end of the plug, approximately 1/16-inch (1,5 mm) from the
end. Apply a bead of sealant along the length of the threaded hole on the servo body (1 or 1A).
Install the plug in the servo body and tighten it securely.
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
B. Install the bolt (19) and the washer (20) in the servo body (1 or 1A). Tighten the bolt
securely.
C. Install the packings (12) in the packing grooves of the servo body (1 or 1A).
D. Install the packing (10) in the packing groove of the seat (7). Install the seat in the servo
body (1 or 1A).
E. Install the packings (9) in the packing grooves of the poppet (2).
F. Install the packing (11) in the packing groove of the guide (6). Install the guide on the poppet
(2) and secure it with the E-ring (14).
G. Install the poppet and guide assembly in the servo body (1 or 1A) and secure it with the
retaining ring (15).
H. Install the piston (5), the spring (4), the shims (33) and the spacer (8) on the poppet (2), and
secure them by installing the E-ring (14).
I. Install the cap (3) in the servo body (1 or 1A) and secure it with the retaining ring (16).
J. Install the orifice (31) and the packings (13) in the ports of the servo body (1 or 1A). Use
masking tape to retain these parts.
5. Assembling the Spring-Set Servo Assembly (Refer to IPL Figure 2)
CAUTION: DO NOT USE TEFLON TAPE ON THE THREADS OF THE PLUG.
A. If a plug (17 or 24) has been removed, apply a small bead of pipe thread sealant (SWAK)
around the threads at the small end of the plug, approximately 1/16-inch (1,5 mm) from the
end. Apply a bead of sealant along the length of the threaded hole on the servo body (1 or 1A).
Install the plug in the servo body and tighten it securely.
B. Install the bolt (19) and the washer (20) in the servo body (1 or 1A). Tighten the bolt
securely.
C. Install the packing (12) in the packing groove of the servo body (1 or 1A).
D. Install the packing (10) in the packing groove of the seat (7). Install the seat in the servo
body (1 or 1A).
E. Install the packings (9) in the packing grooves of the poppet (40).
F. Install the packing (11) in the packing groove of the guide (6). Install the guide (6) on the
poppet (40), and secure it with the E-ring (14).
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
G. Install the poppet and guide assembly in the servo body (1 or 1A) and secure it with the
retaining ring (15).
H. Install the piston (5) on the poppet (40), and secure it by installing the E-ring (14).
I. Install the spring (35) and the retainer (39) in the servo body (1 or 1A).
J. Install the setscrew (38) in the cap (34). Install the cap in the servo body (1 or 1A). Adjust the
setscrew so that it contacts the retainer (39) without compressing the spring (35). Secure the
cap by installing the retaining ring (16).
L. Install the screw (37) and the washer (36) in the cap (34). Tighten the screw securely.
M. Install the orifice (31) and the packings (13) in the ports of the servo body (1 or 1A). Use
masking tape to retain these parts.
ILLUSTRATED PARTS LIST
1. General
This section lists, describes, and illustrates all detail parts required for maintenance support of the
Bypass Servo Assembly.
2. Scope of Information
A. The parts list is arranged in the general order of disassembly. The listing is indented to show the
relationship between each part and its next higher assembly. Item numbers used in the parts list are
keyed to the corresponding numbers of the accompanying illustration.
B. MODIFICATION CODE
The modification code indicates the parts usage with respect to the end item. When the MODIFICATION CODE column is blank, the part usage is applicable to all versions unless otherwise
specified in the DESCRIPTION column. Modification codes used in this manual are listed in the
following table.
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Maintenance Manual
Bypass Servo Assembly – 2691786 Series
C. How to Identify a Part
1) When the part number is known: Refer to the parts list for the item number, description,
modification codes, and quantity. Refer to the illustration to verify the physical appearance and
location of the part.
2) When the part number is not known: Review the illustrations to identify the part by physical
appearance and location. Refer to the accompanying parts list to obtain the part number,
description, modification codes, and quantity.
D. Abbreviations
AR Used as required.
ASSY
Assembly.
FIG.
Figure.
IPL
Illustrated Parts List.
MOD
Modification.
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Maintenance Manual
Bypass Servo Assembly – 2691786 Series
FIG.
DESCRIPTION
MOD
UNITS
1234567
CODES
PER ASST
PART NUMBER
ITEM
2691786C/G BASELINE – AIR-SET BYPASS SERVO ASSEMBLIES
1
2691786
SERVO ASSEMBLY, BYPASS
1
011001-101
∙ BODY, SERVO (Bar Stock) (Aluminum alloy)
011001-102
D
∙ BODY, SERVO (Stainless steel) 001003-101
∙ BODY, SERVO (Bar Stock) (Aluminum alloy) (Alternate for
011001-101)
1:00 2691728-1-1
∙ BODY, SERVO (Casting) AM
(Aluminum alloy) (Alternate for
011001-101)
2691728-2-1
∙ BODY, SERVO (Casting) (Aluminum alloy) (Alternate for
011001-102)
2
2691783
∙ POPPET 3
2691781
∙ CAP 4
F60D1474
∙ SPRING, COMPRESSION (Wire diameter: 0.120 inch)
5
2691779-1
∙ PISTON 6
2691777-1
∙ GUIDE 7
2691776-2
∙ SEAT 9
2661058BD008
∙ PACKING, PREFORMED REF
1
1
1
1
1
1
1
1
1
1
1
2
10
11
12
C2661058A014
C2661058A015
2661058BD218
∙ PACKING, PREFORMED ∙ PACKING, PREFORMED ∙ PACKING, PREFORMED 1
1
2
13
14
C2661058A013
X5133-31
∙ PACKING, PREFORMED ∙ RING, E 2
2
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Maintenance Manual
Bypass Servo Assembly – 2691786 Series
FIG.
DESCRIPTION
MOD
UNITS
1234567
CODES
PER ASST
PART NUMBER
ITEM
15
16
17
19
20
24
25
N5000-102H
N5000-125
CAN932-2
2701361
2706580-115
CAN932-3
CNAS1352C3-12
26
CMS35333-138
31
33
2691787-1
2691787-7
1429-599826
∙ RING, RETAINING ∙ RING, RETAINING ∙ PLUG ∙ BOLT, MACHINE ∙ WASHER, NONMETALLIC (Zytel) ∙ PLUG (Not used on Mod E) ∙ SCREW, CAP, SOCKET HEAD (For mounting on main valve)
∙ WASHER, LOCK (For mounting on main valve)
∙ ORIFICE (0.093 inch inside diameter) ∙ ORIFICE (0.062 inch inside diameter) ∙ SHIM (Quantity: 4 maximum) 1
1
1
1
1
1
4
4
C
G
1
1
AR
AIR-SET BYPASS SERVO PARTS KITS AVAILABLE
KIT PART
NUMBER
DESCRIPTION
APPLICATION
ITEMS IN KIT (IPL Figure 1)
2702278-3
Seals
Air-Set Bypass Servo
9, 10, 11, 12, 13, 14, 15
Meggitt Fuelling Products
Maintenance Manual
Bypass Servo Assembly – 2691786 Series
IG.
ITEM
2
1
1:00
AM
5
6
7
9
10
11
12
13
14
15
16
17
19
20
24
DESCRIPTION
MOD
UNITS
1234567
CODES
PER ASST
PART NUMBER
2691786H/J BASELINE – SPRING-SET BYPASS SERVO ASSEMBLIES
2691786
SERVO ASSEMBLY, BYPASS
011001-101
∙ BODY, SERVO (Bar Stock) (Aluminum alloy)
011001-102
D
∙ BODY, SERVO (Stainless steel) 001003-101
∙ BODY, SERVO (Bar Stock) (Aluminum alloy) (Alternate for
011001-101)
2691728-1-1
∙ BODY, SERVO (Casting) (Aluminum alloy) (Alternate for
011001-101)
2691779-1
∙ PISTON 2691777-1
∙ GUIDE 2691776-2
∙ SEAT 2661058BD008
∙ PACKING, PREFORMED 2661058A014
∙ PACKING, PREFORMED 2661058A015
∙ PACKING, PREFORMED 2661058BD218
∙ PACKING, PREFORMED 2661058A013
∙ PACKING, PREFORMED X5133-31
∙ RING, E N5000-102H
∙ RING, RETAINING N5000-125
∙ RING, RETAINING CAN932-2
∙ PLUG 2701361
∙ BOLT, MACHINE 2706580-115
∙ WASHER, NONMETALLIC (Zytel) CAN932-3
E
∙ PLUG REF
1
1
1
1
1
1
1
2
1
1
2
2
2
1
1
1
1
1
1
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Maintenance Manual
Bypass Servo Assembly – 2691786 Series
DESCRIPTION
FIG.
MOD
UNITS
PART NUMBER
1234567
ITEM
25
CNAS1352C3-12
26
CMS35333-138
31
34
35
2691787-1
2691787-7
2881012-101
2721715
36
37
38
39
40
2706580-109
CMS35308-301
1032X1-3/16SS
2692178
2691783
CODES
∙ SCREW, CAP, SOCKET HEAD (For mounting on main valve)
∙ WASHER, LOCK (For mounting on main valve)
∙ ORIFICE (0.093 inch inside diameter) ∙ ORIFICE (0.062 inch inside diameter) ∙ CAP ∙ SPRING, COMPRESSION (Wire diameter: 0.105 inch)
∙ WASHER, NONMETALLIC (Zytel) ∙ SCREW, MACHINE ∙ SETSCREW ∙ RETAINER ∙ POPPET PER ASST
4
4
H
J
J
1
1
1
1
1
1
1
1
1
SPRING-SET BYPASS SERVO PARTS KITS AVAILABLE
KIT PART
NUMBER
DESCRIPTION
APPLICATION
ITEMS IN KIT (IPL Figure 2)
2702278-3
Seals
Spring-Set Bypass Servo
9, 10, 11, 12, 13, 14, 15
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