UNDER CARRIAGE 16000 SERVICE/MAINTENANCE MANUAL
8-6
Published 05-03-17, Control # 228-03
HYDRAULIC HAND PUMP
See Figure 8-4 for the following procedures.
Assembly
To assemble the pump, use the following procedure:
1. Connect the hose from the pump outlet port to the
cylinder inlet.
2. Apply 1-1/2 wraps of a high-grade thread sealant on the
fittings (for example, Teflon tape).
Do not apply sealant to the first complete thread to
ensure the tape does not shed into the hydraulic system
and cause malfunctioning or damage.
Do not over-tighten the connections. The connections
only need to be snug and leak free. Over-tightening can
cause premature thread failure and may cause fittings or
castings to split at lower than their rated pressures.
Operation
To operate the pump, use the following procedure:
Before using the pump make sure all the fittings are tight and
leak free, check the oil level.
1. To pressurize the cylinder and extend the rod, close the
valve by turning it clockwise until finger-tight. Then,
pump the handle up and down.
Pressure will be maintained until the valve is opened.
To reduce handle effort at high pressure, use short
strokes. Maximum leverage is obtained in the last five
degrees of stroke.
2. To depressurize the cylinder, push the handle down fully.
Open the valve by turning it counterclockwise until you
hear air being released.
The pump can be operated in any position to vertical as long
as the hose end of the pump is down.
Maintenance
To maintain the pump, use the following procedure:
1. Keep the unit clean and stored in a safe place where it
cannot be damaged.
2. Keep oil in the pump at the proper level. Check the level:
a. Open the valve and fully retract the cylinder rod to
return all oil to pump. The cylinder must be fully
retracted or the system will contain too much oil.
b. For a Simplex pump, use the following:
- Place the pump in horizontal position on a flat
surface.
- Using a screw driver, remove the fill cap.
- Add hydraulic oil until the reservoir is 2/3 full. Do
not overfill the pump.
- Securely reinstall the fill cap.
c. For an Enerpac pump, use the following:
- Place the pump in vertical position with the
hose end down.
- Using a screw driver, remove the vent/fill cap.
- Add hydraulic oil until it is at the mark on the
dipstick.Do not overfill the pump.
- Securely reinstall the fill cap.
d. Test the pump operation and remove air from the
system, if required. Recheck the oil level after
removing the air.
WARNING
Prevent Possible Death or Serious Injury
to Maintenance Personnel!
Manitowoc has provided a hand pump and cylinder for
crawler adjustment only. Any other use is neither intended
nor approved.
Wear safety glasses and other personal protective gear
when operating the hand pump.
Do not exceed the maximum pressure rating of 700 bar
(10,153 psi) for the components (pump, cylinder, hose).
Higher pressure can cause components to explode.
Do not set the pump relief valve above 700 bar (10,153
psi). Higher pressure can cause components to explode.
The pump can explode. The pump is not vented and may
explode if subjected to high pressure. Do not overfill the
pump.
The pump handle can kick back. Always keep your body
to the side of the pump, away from the line of handle
force. Do not add extensions to the handle. Extensions
can cause unstable operation. Do not add extensions to
the handle.