HYDRAULIC CYLINDER (MAIN FRAME TO MAST) REPLACEMENT
Fifth Wheel Towing Device in
Pin, retaining, upper (2) (1036-1)
Pin, retaining, lower (2) (1035-1)
Personnel Required: 2
Tool Kit, Mechanics General,
General Safety Instructions
A suitable lifting device for 48 lbs (21.8 kg)
Ensure hydraulic protection valve is open (breather switch inline with
breather) prior to operating hydraulics. Failure to comply could cause
injury or death to personnel or damage to equipment.
High pressure is present in the 250M Fifth Wheel Towing Device
hydraulic system. Do not disconnect any hydraulic system component
unless hydraulic system pressure has
been relieved. Ensure each
hydraulic control lever is moved several times through all positions.
Failure to comply may result in severe injury or death to personnel.
Spilled hydraulic oil is very slippery. Be careful when entering or
working in area. Wipe up any spilled oil immediately. Failure to
comply may result in severe injury or death to personnel.
While operating or performing maintenance on any hydraulic systems,
never place personnel or equipment in a potentially hazardous position
(i.e., between moving parts or under hydraulic supported equipment).
Failure to comply may result in injury or death to personnel.
All hydraulic hoses must be capped and/or plugged when disconnecting to
Cut plastic ties as needed. Note location of plastic ties and hydraulic hoses
prior to removal.
The following procedures are for the removal of the main frame to mast cylinders.
Adjust maintenance steps performed to accommodate the required maintenance.