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12 308200
Service
Required Tools
D Torque wrench
D Bench vise, with soft jaws
D Rubber mallet
D Hammer
D Razor or other sharp tool
D 8 mm (5/16 in.) dia. brass rod
D 8 mm, 11 mm, 15 mm, 25 mm, 3/4 in., and 7/8 in.
open–end wrenches
D 17 mm box or socket wrench
D 22 mm crow’s–foot wrench
D Adjustable wrenches
D 24 in. adjustable wrench
D Thread lubricant
D Anaerobic thread sealant
Disconnecting the Displacement Pump
1. Flush the pump, if possible. Stop the pump at the
bottom of its stroke.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
Keep hands and fingers away from the priming
piston during operation and whenever the pump is
charged with air. On the pump downstroke the
priming piston extends beyond the intake cylinder
to pull the material into the pump. The priming
piston works under extreme force. During operation
and whenever the pump is charged with air, the
priming piston can severely injure or amputate a
hand or finger, or break a tool, caught between it
and the intake cylinder.
The air motor piston (located behind the air motor
plates) also moves when air is supplied to the
motor. NEVER operate the pump with the air motor
plates removed.
2. Relieve the pressure.
3. Disconnect the air hose. Hold the fluid outlet fitting
(7) with an adjustable wrench to keep it from being
loosened while you disconnect the fluid hose.
Remove the pump from its mounting. Note the
relative position of the pump’s fluid outlet to the air
inlet.
4. Using an adjustable wrench, unscrew the coupling
nut (104) from the connecting rod (103). Remove
the coupling collars (105). Take care not to lose or
drop them. See Fig. 4.
5. Hold the tie rod flats with an 11 mm wrench to
keep them from turning. Use the wrench (113)
provided with the pump (or a 17 mm box or socket
wrench) to unscrew the locknuts (106) from the tie
rods (102). Carefully pull the displacement pump
(107) off the air motor (101).
6. Refer to page 14 for displacement pump service.
To service the air motor, refer to the separate air
motor manual, supplied.