Air Motor and Throat Service
Before You Start
DBe sure you have all necessary parts on hand. Air Motor Repair Kit 207385 includes repair parts for the motor. Use all the parts in the kit for the best results. Parts included in the kit are marked with one asterisk, for example (19*), in the text and drawings. See the Parts List on page17.
DTwo accessory tools should be used: Padded Pliers, 207579, are used to grip the trip rod without damaging its surface, and a
9.Remove the eight screws (3) holding the cylinder (30) to the base (28). Carefully pull the cylinder straight up off of the piston assembly (27).
CAUTION
To avoid damaging the cylinder wall, lift the cylinder straight up off of the piston. Never tilt the cylinder as it is being removed.
Disassembly
1. Flush the pump.
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 8.
2.Relieve the pressure.
3.Disconnect the hoses, remove the pump from its mounting, and clamp the air motor base (28) in a vise horizontally by closing the vice jaws on the flange.
4.Use a strap wrench on the displacement pump cylinder (110) to screw it out of the air motor base
(28).See Fig. 3.
5.Remove the piston/valve seat (109) from the rod
(29)with wrenches or with the vice and a wrench.
6.Remove the piston ball (103),
7.Remove the air motor base from the vice, and place the piston rod (29) flats in the vice with the air motor up.
8.Loosen the lift ring (24). Pull up the lift ring, grip the trip rod (31) with the padded pliers, and screw the lift ring off of the rod.
31
27
3
28
103
113
flange
109
110 
24
30
29
10{
108{
107{
105{
TI1076
CAUTION
Do not damage the plated surface of the trip rod (31). Damaging the surface of the trip rod can result in erratic air motor operation. Use the special padded pliers, 207579, to grasp the rod.
10 308608K
Fig. 3 | 06033 | |
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{Included in Pump Repair Kit 238225, which may be purchased separately.
