Pump Service
Repair kits are available. See Pump Repair Kits on page 13. For the best results, use all parts in the kits.
Relieve the pressure (see page 5) before you proceed with service.
NOTES:
DThe following metric wrenches are needed:
10 mm, 13 mm, and 30 mm.
DThere are two tool kits to aid in servicing the pump. Kit 800298 is used to ease installation of packings. Kit 800271 includes the items in 800298 and tools to aid in the removal of packing retainers.
Valves
NOTE: For a set of six valves, order 801472.
1.Remove the hex plug from the manifold using a 30 mm wrench.
2.Examine the
3.Remove the valve assembly from the cavity; the assembly may come apart.
4.Install the new valve. Install the
NOTE: Retorque the plug after 5 hours of operation.
Pumping Section
1.Remove the eight capscrews and lockwashers from the manifold using a 13 mm wrench.
2.Carefully separate the manifold from the crankcase.
NOTE: You might have to tap the manifold lightly with a soft mallet to loosen it.
CAUTION
To avoid damage to the plunger or seals, keep the manifold properly aligned with the ceramic plungers when you remove it.
3.Carefully examine each plunger for any scoring or cracking, and replace as necessary.
Servicing the Plungers
NOTE: Plunger repair kit 801474 is available to replace retainers,
1.Loosen the plunger retaining screw five to six turns using a 10 mm wrench. Push the plunger towards the crankcase to separate the plunger and retaining screw.
2.Remove the screw from the plunger, and examine the
3.Remove the plunger and flinger from the plunger shaft. Clean, examine, and replace parts as necessary.
4.Inspect the plunger shaft for oil leakage from the crankcase. If leaking is obvious, replace the oil seals. Otherwise, DO NOT remove these seals because they cannot be reused. Oil Seal Kit 801473 is available for replacing the seals.
5.Lightly grease the flinger (and the oil seal if it is being replaced), and replace on the plunger shaft. Then install the plunger.
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