4-7: Machine Maintenance
Plunger Maintenance
Remove the manifold as described above. Remove the packing retainers if they 1.
remain on the pistons after removing the manifold.
Remove the nut and washer on the end of the piston using a 13mm wrench or
2.
socket.
Slide the ceramic plunger and the remaining washer from the piston guide. Inspect
3.
the ceramic piston, O-ring and washers for wear. Replace if necessary.
Plunger Re-assembly
Generously grease the piston guide. Replace the O-ring making sure it does not
1.
twist or roll.
Slide the lower washer and ceramic bushing onto the piston guide.
2.
Place a small amount of LOCTITE 243™ on the piston guide threads. Replace the 3.
old washer and thread the nut onto the piston guide. Torque to 4.5 ft-lbs.
Servicing the Crankcase
While the manifold and plungers are removed, rotate the crankshaft by hand. Closely
1.
examine the crankcase oil seals for drying, cracking or leaking.
Consult the local HydraMaster distributor if crankcase servicing is necessary.
2.
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