Manitowoc Published 09-10-14, Control # 065-24 8-7
14000 SERVICE MANUAL UNDER CARRIAGE
HYDRAULIC HAND PUMP
See Figure 8-3 for the following procedures.
Assembly
1. Connect hose from pump outlet port to cylinder inlet.
2. Use 1-1/2 wraps of a high-grade thread sealant on
fittings (for example, Teflon tape).
Do not apply sealant to first complete thread to
ensure tape does not shed into hydraulic system
and cause malfunctioning or damage.
3. Do not overtighten connections. Connections only need
to be snug and leak free. Overtightening can cause
premature thread failure and may cause fittings or
castings to split at lower than their rated pressures.
Maintenance
1. Keep unit clean and stored in a safe place where it
cannot be damaged.
2. Keep oil in pump at proper level. Check level as follows:
a. Open valve and fully retract cylinder rod to return all
oil to pump. Cylinder must be fully retracted or
system will contain too much oil.
b. Place pump in horizontal position on a flat surface.
c. Using a screw driver, remove vent/fill cap.
d. Add hydraulic oil until reservoir is 2/3 full. Do not
overfill.
e. Securely reinstall vent/fill cap.
f. Test operation and remove air from system, if
required. Recheck level after removing air.
Air Removal
1. Close valve finger-tight only.
2. Position pump higher than cylinder and position cylinder
so rod is down.
3. Operate pump to fully extend cylinder rod.
4. Open valve and retract cylinder rod to force oil and
trapped air back into pump.
5. Repeat steps until cylinder operates smoothly. Erratic
operation indicates air in system.
Operation
1. Before using pump:
a. Check that all fittings are tight and leak free.
b. Check oil level.
2. To pressurize cylinder and extend rod, close valve by
turning clockwise until finger-tight only. Then pump
handle up and down.
Pressure will be maintained until valve is opened.
To reduce handle effort at high pressure, use short
strokes. Maximum leverage is obtained in last five
degrees of stroke.
3. To depressurize cylinder, push handle down fully and
open valve by turning counterclockwise.
4. Pump can be operated in any position from horizontal to
vertical as long as hose end of pump is down.
WARNING
Prevent Possible Death or Serious Injury
to Maintenance Personnel
Manitowoc has provided 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 hand pump.
Do not exceed maximum pressure rating of components
(pump, cylinder, hose) – 10,000 psi (700 bar). Higher
pressure can cause components to explode.
Do not set pump relief valve higher than 10,000 psi (700
bar). Higher pressure can cause components to explode.
Pump is not vented. It can explode if subjected to high
pressure. Do not attempt to return more oil to pump than it
is capable of holding. Do not overfill pump.
In some cases, pump handle can “kickback.” Always keep
your body to side of pump, away from line of handle force.
Do not add extensions to handle. Extensions can cause
unstable operation.
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