JETStream 3000 series, Operation Manual, Page: 62 / 84

Operation Manual
54
Crosshead Pony Rod Seals
Removal
1. Relieve pressure from the pump, shut off the
engine, and disengage the clutch.
2. Turn off the water supply and drain the water
tank.
3. Drain the oil from the crankcase. Refer to
“Changing the Power End Oil” on page 53
for instructions.
4. Open the rod box cover.
5. Disconnect the water lubrication lines if de-
sired for easier access.
6. Position the pony rod to be serviced so that it
is at top dead center (plunger fully extended
towards the crankshaft). Pull on the drive belts
to rotate the pump (Figure 99).
7. Remove the two capscrews that secure the
plunger coupling (Figure 100) to the plunger
and remove the coupling. Rotate the pump
until the pony rod is fully retracted.
Note:
The coupling halves are a machined
pair. Keep the two halves together.
8. Slide the rubber deflector (Figure 100) off of
the pony rod.
9. Remove the three capscrews and washers
that secure the rod box cover to the frame.
Remove the cover. Remove the rubber wash-
ers that sit below the mounting plate.
10. Using a 1/4” hex driver, loosen the set screw
inside the bolt hole 2-3 full revolutions (Figure
101).
WARNING
!
Use caution when rotating the pump as this
can be a pinch hazard.
Figure 99: Rotating the Belt Drive.
Figure 100:
Plunger Coupling Removal.
Deflector
Plunger Coupling
Plunger
Figure 101: Set Screw Access.
Hex Driver