Manitowoc 16000 Service And Maintenance Manual

Reference Only
Manitowoc Published 05-09-17, Control # 014-28 2-31
16000 SERVICE/MAINTENANCE MANUAL HYDRAULIC SYSTEM
2
Charge Pressure Adjustment
The following adjustment is only required when a system
fails the Charge Pressure Test described in this section.
1. Scroll to diagnostic screen for corresponding function
(see Figure 2-29
).
2. Start and run engine at high idle. With function in neutral,
system pressure on diagnostic screen should read 320
to 370 psi (22 to 26 bar).
3. If specified pressure is not indicated, stop engine and
connect an accurate 0 to 1,000 psi (0 to 69 bar)
hydraulic pressure gauge to coupler at corresponding
pressure sender (see Figure 2-35
).
4. Repeat step 2. If specified pressure is still not indicated:
• Do a Pressure Sender Test as instructed in this
section. Replace faulty pressure sender if needed.
• Do a Control Calibration as instructed in this
section.
If specified pressure is still not indicated:
• If pressure is too high, check that pump neutral is
adjusted properly. If pressure is still high, adjust
charge pressure relief valve.
• If pressure is too high, adjust charge pressure relief
valve. If you cannot raise charge pressure,
excessive system leakage is indicated.
5. To adjust charge pressure:
See Figure 2-30
for the following procedure.
a. Loosen lock nut (1).
b. Adjust adjusting plug (2).
- Turn IN to INCREASE pressure
- Turn OUT to DECREASE pressure
c. Once specified pressure is indicated, hold adjusting
plug (2) in position and securely tighten lock nut (1).
6. Stop engine and remove gauge from transducer gauge
port.
Pump Neutral Adjustment
See Figure 2-31 for the following procedure.
To adjust pump neutral:
1. Park all crane functions and stop engine.
2. Disconnect electric connector from pump EDC (see
Figure 2-34
).
3. Install an accurate 0 to 1,000 psi (0 to 69 bar) hydraulic
pressure gauge in each servo gauge port (1).
4. Start and run engine at high idle.
5. Loosen lock nut (2).
6. Using an internal hex wrench, turn adjusting screw (3) IN
until pressure INCREASES in either gauge.
7. Note angular position of internal hex wrench.
8. Then, turn adjusting screw OUT until pressure
INCREASES an equal amount in other gauge.
9. Again, note angular position of internal hex wrench.
10. Turn adjusting screw IN half the distance between
positions noted above.
11. Pump control should now be in neutral with both gauges
reading same pressure.
12. Hold adjusting screw (3) in position and securely tighten
lock nut (2).
13. Stop engine, remove gauges, and securely install servo
gauge port plugs (1).
Low Pressure Accessory Adjustment
See Figure 2-32 for the following procedure.
Pressure reducing valve (1) controls pressure in the low
pressure accessory systems — swing brake, swing lock
(past production), travel brakes, and travel 2-speed.
Item Description Hex Wrench Size
1 Lock Nut 1/2 inch
2
Adjusting Plug
Series 030-100
1-1/16 inch
Adjusting Plug
Series 030-100
1-5/8 inch
1
P1600a
FIGURE 2-30
2
Typical Pump Installation

Manitowoc 16000 Specifications

General

Brand	Manitowoc
Model	16000
Category	Construction Equipment
Language	English