Alamo BUSH HOG RMB 1660 Operator's Manual page 170

Problem
Cylinder Rod Came Out
of Cylinder
Deck Cracks
Deck Worn On
Underside (Cutting
Head Only)
Hydraulic System Noise
(Squeal)
Hydraulic System
Overheating
Boom Breaks Back Too
Easily
RMB 1660 01/22
© 2022 Alamo Group Inc.
OPERATION
Possible Cause
Piston Nut backed off of
the Rod
Relief Valve setting Too
High
Operator abuse
Severe Use or Abuse
Vibration
Poor or missing welds
Mowing over sand or rocks
Abusive operation,
mowing heavy debris
Normal operational wear
Restrictions to oil flow in
the system
Relief Valve Malfunction
Cavitation
Wrong Oil Used
Excessive Engine RPM
Restriction in Hydraulic
System
Relief Valve Set too low
Internal Leakage due to
wear
Excessive Pump or Motor
Wear
Wrong Oil
Abusive Operation (Heavy
Material or debris)
Cutting head "Plowing" in
Ground
Operator Traveling Too
Fast
Operation Section 4-48
Remedy
Improper retaining of nut, replace or rebuild as
required
Test relief valve and adjust or replace as
required
Overloading cylinder in the extend position
Excessive ground speed, Overload or impact
with solid objects
Blades or blade bar bent, or blade missing
Manufacturing defect
Operator training
Operator training
Normal wear over time can result in cracks or
damage. Check deflectors and guards.
Replace as required.
Identified by concentration of heat, due to Line
restriction bent hoses or contamination.
Relief setting too low, will result in generation of
heat, Adjust or replace as needed.
Induction of air into the system due to leakage
Flush and refill as required
Engine RPM should not exceed 2000 speed as
indicated on the tractor tachometer.
Identified by a concentration of heat due to
crimped hydraulic line, relief valve failure or
contamination.
Test and adjust or replace as required
Test pump and motor. Replace or repair as
required
Test pump and motor. Replace or repair as
required
Flush and refill as required with proper oil
Operator training
Operator Error, Operator Training
Operator Error, Operator Training