10 306982
Service
Reassembly
1. Clean all the parts carefully in a compatible solvent
and inspect for wear or damage. Use all the repair
kit parts during reassembly and replace other parts
as necessary.
2. Check the polished surfaces of the piston, piston
rod and cylinder wall for scratches or wear. A
scored rod will cause premature packing wear and
leaking.
3. Lubricate all parts with a light, waterproof grease.
4. Be sure the o-rings are in place. Slide the piston
rod down through the throat bearing and lower the
piston (Y) into the air motor base (J).
5. Pull the exhaust valve poppets (X**) into the valve
actuator (V) and clip off the top part shown with
dotted lines. See Fig. 3.
6. Install the transfer valve poppets (R**) onto the
valve stems (O**), then reassemble the valve
stems (O**), bottom adjusting nuts (Q**),
grommets (P**), and top adjusting nuts (M**) on
the piston (Y). Assemble the trip rod (H), valve
actuator (V), trip rod yoke (K) and toggle
assemblies (E) on the piston. See Fig. 3.
7. Before installing the lockwires (L**) in the adjusting
nuts (M** and Q**), use the special gauge 171818
to adjust the transfer valve (N) so there is 0.125 in.
(3.18 mm) clearance between the poppets (R**)
and the piston (Y) when the toggle assemblies are
in the down position. See Fig. 3.
8. Snap the toggle assemblies (E) to the up position.
Reinstall the cylinder (G) and cap nut (F).
Reassemble the air motor to the displacement
pump.
9. Before remounting the pump, connect an air hose
and run the pump slowly, at about 40 psi
(0.28 MPa, 2.8 bar) to ensure that it operates
smoothly.
10. Reconnect the ground wire before regular
operation of the pump.
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