HYDRAULIC SYSTEM 16000 SERVICE/MAINTENANCE MANUAL
2-16
Published 05-09-17, Control # 014-28
SHOP PROCEDURES
Initial Oil Fill
The following procedure is used at Manitowoc to fill the
hydraulic system on new cranes. It is necessary to use this
procedure in the field only if the entire hydraulic system has
been drained.
1. Fill all motor cases with oil (Figure 2-16
).
a. Disconnect fittings at case drain ports.
b. Fill each motor case to level of case drain port. Use
new hydraulic oil filtered through a 10-micron
filter.
c. Reconnect fittings.
2. Open vent ports (Figure 2-1
or FIGURE 2-1 continued).
a. If equipped, remove vent plug from top of both
charge filters (6).
b. Remove vent cap (9) from both ends of charge
pressure manifold.
c. Remove vent plug (10 or 12) from suction manifold.
d. If equipped, remove vent cap (11) at accessory
pump.
3. Make sure drain valve (8, Figure 2-1
) is closed.
4. At engine, disengage engine clutch (Figure 2-17
).
5. Fill tank manually through plug opening (2a) or by
pumping oil through power-fill coupling (2b) with an
owner supplied portable pump. Use new hydraulic oil
filtered through a 10-micron filter.
Do not fill tank through breather port or top of either
filter. Hydraulic system could be contaminated from
unfiltered oil.
6. Securely install vent plug (10 or 12, Figure 2-1
) and vent
cap (11) as soon as clear oil appears at each vent
opening.
7. If required, apply 3 to 5 psi (0.20 to 0.34 bar) owner
supplied air pressure to air valve (4a, Figure 2-1
) or
coupler (4b) on hydraulic tank.
The tank breather allows 3 psi (.21 bar) pressure to
remain in the tank to force oil into the charge system.
8. Observe bleed ports as charge system fills.
a. If equipped, securely install vent plugs when clear
oil starts flowing from bleed ports in charge filters
(6).
b. Securely install vent caps (9) when clear oil starts
flowing from bleed ports in charge pressure
manifold.
NOTE: It is extremely important to perform the bleed
procedure described above in the field any time the
system is drained completely – for any reason.
9. Check for hydraulic leaks and correct if found.
Initial Start-Up
The following procedure is used at Manitowoc to start the
engine the first time on new cranes. It is necessary to use
this procedure in the field only if the entire hydraulic system
has been drained.
The procedure requires two people: one to start the engine
and monitor pressures on the diagnostic screens and one to
monitor and close the bleed valves.
1. BEFORE starting engine, calibrate pressure senders as
described in this section.
FIGURE 2-17
Left Side of Rotating Bed
P2290
Pull Handle Out
and Down to
DISENGAGE
Engine Clutch
Handle
WARNING
Burn Hazard!
Oil in hydraulic tank may be under pressure and
extremely hot.
Hot oil can escape when you remove either filter cover.
RELIEVE PRESSURE through air valve (4a, Figure 2-1
)
in top of tank before servicing.
CAUTION
Avoid Damage to Hydraulic System!
If hydraulic fluid low alarm comes on at any time during
start-up procedure, add oil to tank.
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