Manitowoc Shuttlelift CD5515-2 Service And Maintenance Manual

HYDRAULIC SYSTEM CD5515-2/YB5515-2 SERVICE MANUAL
4-4 Published 1-20-2017, Control# 483-02
Slow operating speeds (All functions). Low engine rpm. Increase engine rpm.
Air leak in pump inlet line. Tighten pump inlet line. Replace O-ring
in inlet flange.
Air in oil (foam in tank). Check oil level, look for leaks in
the system.
Leakage in the load sense relief valve. Remove and clean or replace the
relief valve.
Improper load sense relief valve
setting.
Replace the relief valve.
Leakage in hydraulic swivel. Replace seals on swivel shaft.
Control valve not fully actuated. Check spool travel.
Improper primary pump. Check and adjust pump pressure
settings. See Checking and Adjusting
Hydraulic Pressure Settings, page 4-
15.
Faulty pump. Overhaul or replace pump.
No movement when system is first
started.
Low oil level. Check and add oil.
Air or restriction in inlet line to pump
pressure.
Check and tighten inlet line. Clear
restriction.
Cold oil or wrong weight of oil. Use correct oil, follow normal
warming procedure.
Loss of movement during operation. Low oil level. Check and add oil.
Vacuum in hydraulic tank. Clean tank filler/breather cap.
Restriction or leakage in the relief
valve.
Clean or replace the relief valve.
Broken hydraulic line. Replace.
Bad seal in hydraulic swivel. Replace seals.
Broken gear or shaft in pump. Overhaul or replace.
Overheating of hydraulic oil. Wrong operation (running over the
load sense relief pressure setting for
long periods).
Change procedure of operation.
Dirty filters. Change filter.
Oil too light. Use correct oil.
Low oil level. Check and add oil.
Dirty oil. Change oil and filters. See Chapter 5,
1.
Foam in hydraulic oil tank. Leak in system. Check O-ring on pump inlet. Check for
leak in system and correct.
Wrong type of oil. Use correct oil.
Low oil level. Check and add oil.
Bad seal in pump, motor or cylinder. Overhaul or replace.
Short life of pump bearings, shafts, etc. Dirt in oil. Change oil and filter more frequently.
Wrong type of oil. Use correct oil.
Pump leakage (external). Bad seal on pump shaft. Replace shaft seal.
Bad seals between pump sections
(Swing & Steering).
Replace seals.
Problem Possible Cause Remedy
Reference Only

Manitowoc Shuttlelift CD5515-2 Specifications

General

Brand	Manitowoc
Model	Shuttlelift CD5515-2
Category	Construction Equipment
Language	English