Manitowoc 1400A User Manual

National Crane 1-21-2019 Control # 104-07 2-11
1400A SERVICE MANUAL HYDRAULIC SYSTEM
2
Telescope In and Telescope Out Reliefs
1. Remove the extend and retract (work port) hoses from
the telescope cylinder (Figure 2-4). Cap the telescope
ports on the cylinder and plug the hoses.
2. Start the engine and set the throttle to governed rpm.
3. Push the telescope control lever to extend.
4. Adjust the telescope extend relief valve on the main
control valve (Figure 2-2) to 18,615 ±689 kPa (2,700
±100 psi).
5. Pull the telescope control lever to retract.
6. Adjust the telescope retract relief valve on the main
control valve (Figure 2-2) to 15,513 ±689 kPa (2,250
±100 psi).
7. Shut down the engine.
8. Reconnect the telescope cylinder hoses.
Outriggers
1. Select an outrigger and remove the retract line from the
outrigger extend cylinder.
2. Install a tee connector with a pressure gauge in the
retract line (Figure 2-5).
3. Start engine and set throttle to governed rpm.
4. Activate the retract function for the selected outrigger
and adjust the flow control relief valve to 20,684 kPa
±689 (3,000 ±100 psi).
5. Shutdown the engine and disconnect the pressure
gauge and reconnect the stabilizer retract line.
FIGURE 2-4
Telescope Cylinder
Work Port Hoses
FIGURE 2-5
Stabilizer Down
Beam Out
Beam In
Stabilizer UP
Outrigger
Outrigger Pressure
Reducing Valve
FIGURE 2-6
Fo
r
Reference
Only

Manitowoc 1400A Specifications

General

Brand	Manitowoc
Model	1400A
Category	Construction Equipment
Language	English