Air Motor and Throat Service
Before You Start
D Be 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 page15. |
D Two accessory tools should be used: Padded |
Pliers, 207579, are used to grip the trip rod without |
damaging its surface, and a |
Gauge, 171818, is used to assure the proper |
clearance between the poppets and seat of the |
piston. |
8.Remove the six screws (3) holding the cylinder (30) to the base (28). Carefully pull the cylinder straight up off of the piston (53).
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.
9.Remove the piston/base from the vise, and set it upright on the workbench.
Disassembly
1.Flush the pump. Follow the Pressure Relief Procedure on page 8 before proceeding.
2.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.
3.Use a strap wrench on the displacement pump cylinder (110) to screw it out of the air motor base
(28).See Fig. 3.
4.Remove the air motor base from the vice, and place the piston rod (29) flats in the vice with the air motor up.
5.Loosen the lift ring (24). Pull the lift ring up, grip the trip rod (31) with the padded pliers, and screw the lift ring off of the rod.
6.Remove the piston/valve seat (109) from the rod
(29)with wrenches or with the vice and a wrench.
7.Remove the piston ball (103),
CAUTION
24
31
19*
53 
20* 
3
28
103 
113
107{
109
110
30
29
10{
flange
TI1067
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.
Fig. 3
{Included in Repair Kit 237602.
10 308485
