Manitowoc 16000 Service And Maintenance Manual

Reference Only
Manitowoc Published 05-09-17, Control # 014-28 2-33
16000 SERVICE/MAINTENANCE MANUAL HYDRAULIC SYSTEM
2
Motor Leakage Test
Perform the following test if troubleshooting indicates the
need:
• Low Charge Pressure
• Sluggish Operation
• Excessive Heat
See Figure 2-33
for the following procedure.
1. Stop engine.
2. Install an accurate flow meter in highest case drain port
(see Figure 2-16
) at desired motor.
• A 3,000 psi (207 bar) in-line meter with a flow rate of
30 gpm (114 L/m) is required.
• All motors except swing require 16 ORS fittings.
Swing requires 12 ORS fittings.
3. For hoist motors only, disable loop flushing as follows:
a. Disconnect loop flushing hose (2) from elbow in loop
flushing valve (1).
b. Install an 08 ORS cap on end of elbow and an 08
ORS plug in end of hose.
4. Start and run engine at high idle.
5. Monitor flow meter. Under all operating conditions,
leakage should not be more than 1-1/2 to 2-1/2 gpm (5,7
to 9,5 L/m.
6. Stop engine and enable loop flushing by reconnecting
hose to elbow in loop flushing valve.
7. Start and run engine at high idle.
8. Monitor flow meter. Under all operating conditions,
leakage should not be more than 5-1/2 to 6-1/2 gpm
(20,8 to 24,6 L/m).
9. If motor leakage without loop flushing is not within
specified range, REPLACE motor and pump.
10. If motor leakage with loop flushing is not within specified
range, REPLACE loop flushing valve and/or motor and
pump depending on which is the cause for high leakage.
Loop Flushing Valve Adjustment
The loop flushing valves for the hoists – load and boom – are
NOT ADJUSTABLE. Do not tamper with settings of valve
cartridges in loop flushing valve manifold.
If you are experiencing excessive leakage do to a faulty loop
flushing valve, replace valve.
Manual Override Tests
The pumps, motors, and solenoid valves are equipped with
manual overrides that allow electric problems to be isolated
from mechanical problems when troubleshooting hydraulic
system problems.
DANGER
Falling or Moving Load Hazard!
To prevent unexpected movement of loads or crane when
operating any manual override:
• Park crane in an area where it will not interfere with
other job site equipment or structures.
• Land all loads and lower boom onto blocking at
ground level.
• Park all crane functions.
FIGURE 2-33
Typical Motor Installation
Item Description
1 Loop Flushing Valve
2 Loop Flushing Hose
3 Motor
1
2
1
P2297b

Manitowoc 16000 Specifications

General

Brand	Manitowoc
Model	16000
Category	Construction Equipment
Language	English