Repair
312796R 13
Replace Pilot Valves1. Stop the pump at the middle of its stroke. Relieve
the pressure. See page 9.
2. Disconnect the air line to the motor.
3. Remove the tie rod shield (TS). Slide the drip shield
(DS) down on the tie rods.
4. Use a 10 mm socket wrench to remove the old pilot
valves (19) from the top and bottom covers.
5. Lubricate and install the new pilot valves (19).
Torque to 95-105 in-lb (11-12 N•m).
Repair Air MotorNOTE: Air Motor Seal Kits are available. See page 21
for the correct kit for your motor. Parts included in the kit
are marked with an asterisk (*). For best results, us e all
the parts in the kit.
Disconnect the Air Motor
1. Flush the pump, if possible. (See package manual)
Relieve the pressure. (See page 9.)
2. Disconnect the air and fluid hoses, the ground wire,
and the tie rod shield.
3. Hold the flats of the air motor piston rod with a
wrench. Use another wrench to loosen the coupling
nut (CN).
4. Remove the tie rod nuts (TN).
5. Use a socket to remove the mounting screws (MS).
6. Lift up on the air motor to remove it. The tie rods and
drip shield will remain attached.
TSDS
ti12916a
F
IG
. 10: Coupling nut removal
F
IG
. 11: Air motor removal
Cart Mount: Remove the two screws on the arms
and tip back or remove the air control panel for eas-
ier removal of the air motor.
CN
TN
ti12815a
MS
ti12818a