12
177-998D
T100 High - Hydraulic Section Service (Cont’d)
Check/Replace Airbleed Valve
a.
See Hydraulic Section Rear View.
Unthread airbleed
valve (65) from diaphragm plate (52). Inspect valve and
replace if needed.
b. Reinstall airbleed valve. Torque to 75 ft-lbs (102 N-m).
Check/Replace Underfill Valve
a.
See Hydraulic Section Rear View.
Unthread underfill
valve (66) from bottom of diaphragm plate (52). Inspect
valve and replace if needed.
b. Reinstall underfill valve. Torque to 30 ft-lbs (41 N-m).
Check/Replace Overfill Valve Assembly
a.
See Hydraulic Section Rear View.
Unthread overfill
valve (69) from bottom of diaphragm plate (52). Inspect
overfill valve and replace if needed.
b. Reinstall overfill valve. Torque to 105 in-lbs (12 N-m).
b.
See Hydraulic Section Parts View.
Remove two cap
screws (59) from diaphragm plate (52).
c. Carefully slide diaphragm plate and assembled parts away
from pump along pump studs.
d. Replace diaphragm plate gasket (24) if damaged.
WARNING: Diaphragm plate (52) and assembled
parts weigh over 100 pounds and are a two man lift.
Use care in handling to prevent personal injury or
damage to equipment.
Note: To ease handling of diaphragm plate, install
two Eyebolts (177-058) from T100 High Pressure
Tool Kit in place of two Setscrews (56) on top of
diaphragm plate.
Hydraulic Section
Disassembly (Cont’d)
Diaphragm Plate Disassembly
WARNING: Manifold (88) and assembled parts weigh
over 200 pounds and are a two man lift. Use care in
handling to prevent personal injury or damage to
equipment.
a. Slide manifold assembly away from diaphragm plate (52),
following steps a. through d. in the Remove Manifold
Assembly Section.
a.
See Bias Rod, Diaphragm Parts, and Hydraulic Section Parts
Views.
Remove diaphragm (73) as in steps a. through c.
above.
Note: Diaphragm clamp (82) may remain pressed on
bias rod.
b. Reinstall screw (74) and remove hex wrench. Let bias
spring (80) snap assembly to diaphragm plate. Diaphragm
clamp will pop off bias rod.
c. Check diaphragm clamp for any rough surfaces, edges, or
corrosion. Replace if necessary.
d. Using snap-ring pliers, extract internal retainer ring (83).
e. Remove bias rod: bias spring spacer (87), spool travel
limiter (81), and bias spring (80).
CAUTION: Do not attempt to disassemble diaphragm
rod subassembly (76). If rod subassembly is damaged,
entire subassembly must be replaced.
f. Remove diaphragm rod subassembly (76)
as one piece.
Inspect rod subassembly. Smooth surfaces and edges as
necessary with emery cloth or fine file. If necessary, replace.
W0537C
Machined cross-hole
80
83
81
87
76
Bias Rod
Bias Rod Disassembly
