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27. Continue turning the set screw until pressure
begins to rise on one of the brake apply pressure
gauges.
28. Back-off the set screw 1/8 turn.
29. Tighten the jam nut (22) and remove the shim
stock inserted in step 25.
30. Fully stroke the brake pedal actuator to check that
output pressure at port "B1" and "B2" are within
specifications.
NOTE: If pedal is adjusted properly, the spring and
spring pivots will not interfere with pedal travel.
31. If pressure is not within specifications, re-adjust.
If pressure is within specifications, apply a few
®
drops of Loctite
to the jam nut.
32. Check internal leakage at port "T". Leakage must
be less than 100 cc/minute with the valve in the
released position and system pressure supplied
to the "P1" and "P2" inlet ports.
33. "T" port leakage must be less than 250 cc/minute
with valve pilot pressure or manual applied.
J03019 1/99
Installation Of Brake Pedal Actuator Assembly
to Brake Valve
1. Install jam nut (22, Figure 3-10) and set screw (21)
to brake pedal actuator (17).
2. Insert nylon bushings (4) into brake pedal actua-
tor.
3. Install one retaining clip (2) to one end of pivot
shaft.
4. Align pedal structure to brake valve (1) and par-
tially insert pivot pin. Move pedal structure to the
"B2" side of valve and insert shims (5) between
pedal structure and brake valve ear to fill gap.
Fully insert the pivot shaft (3). Install the remain-
ing retainer clip (2).
5. Assemble spring assembly (19) and install com-
plete assembly to brake pedal actuator as shown.
Be sure to install spring assembly correctly, with
larger ball socket end pointing to the pedal struc-
ture and smaller end toward the valve assembly.
NOTE: When pedal is adjusted properly, the spring
assembly will not interfere with pedal travel.
Installation of Retard Pedal To Brake Pedal
1. Install nylon bearings (7, Figure 3-10) in retard
pedal.
2. Install retard pedal (16) to brake pedal actuator
(17) with pivot shaft (8). Install two retainer clips
(6).
3. With jam nut (10) loose, adjust capscrew (11) until
roller on retard pedal just contacts the brake
pedal actuator. Tighten jam nut (10).
Brake Circuit Component Service
J3-13
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Troubleshooting
