Manitowoc National Crane 1300A Service And Maintenance Manual

HYDRAULIC SYSTEM 1300A
2-22 01-22-2019 Control # 051-08
Turn does not function
(Standard System)
Attempting to swing up too much of incline. Level machine.
Turn circuit relief valves sticking. Clean and check circuit pressure.
Swing bearing drag. Lubricate thoroughly as rotating boom.
Brake not releasing properly.
Check for 200 + PSI (1.4 MPa) brake pilot pressure.
Clean pilot line or adjust motor counterbalance
valves.
Swing speed adjustment set too low.
Adjust or clean brake for proper release.
Adjust valve on turn motor.
Excessive noise during
operation
Low oil temperature. Allow unit to warm up.
Low hydraulic oil supply. Check and fill with crane in travel position.
Suction line kinked, collapsed or blocked. Clear blockage.
Hydraulic oil too thick. Warm oil or use oil more applicable to environment.
Plugged suction strainers. Remove from tank and clean.
Relief valve chattering. Dirt in relief valve or damaged relief.
Swing brake dragging. Bleed air from brake line at fitting on brake housing.
Hydraulic tubing vibration. Check for loose tubing.
Tank breather plugged. Clean breather.
Cylinders drift
Worn or damaged piston seals. Replace as required.
Air in hydraulic oil. Cycle operate crane cylinder to remove air.
Loose holding valve. Tighten valve.
Dirt in holding or check valve. Clean valve.
Hoist will not lift or hold
load
Load too heavy.
Check load and change to Lo-speed/Hi-pull or
applicable multipart reeving.
Hoist or boom overloaded causing RCL
shutdown.
Reduce load or reeve hoist properly
forshutdown.load lifting.
Relief valve setting too low. Check and adjust if required.
Motor worn. Replace motor.
Sprag clutch defective. Clean or replace Sprag clutch.
Load block too close to boom tip, two-block
system shut down.
Lower load or retract boom. Check two-block
system, repair if defective.
Brake worn out. Repair or replace brake.
Anti-two-block system defective. Repair anti-two-block system.
Hoist gearbox heats
Gearbox grease low. Check and fill as required.
Duty cycle too high. Reduce cycle time or speed of engine.
Truck engine will not start
from crane cab
Truck ignition switch on.
Turn truck ignition off.
Check all other normal motor vehicle systems as
outlined by normal practice.
CONDITION POSSIBLE CAUSE POSSIBLE SOLUTION

Manitowoc National Crane 1300A Specifications

General

Brand	Manitowoc
Model	National Crane 1300A
Category	Construction Equipment
Language	English