Troubleshooting, Problem – SAF-HOLLAND XL-FW428-01 FW2800 Series Hydraulic Elevating Fifth Wheels User Manual
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XL-FW428-01 Rev A SAF-HOLLAND, Inc.
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TROUBLESHOOTING
continued
continued
PROBLEM:
Will not lower.
POSSIBLE CAUSE
SOLUTION
PTO not engaged ........................................ PTO must be engaged when lowering unit.
Engine r.p.m. too low .................................. Increase to 1,000 to 1,200 r.p.m.
PROBLEM:
Will not stay in raised position.
POSSIBLE CAUSE
SOLUTION
Pressure loss ................................................ Air in hydraulic oil. Let stand until clear. Tighten fittings
and check for leaks. Check oil level.
Pressure loss ................................................ Leak in system. Tighten fittings and check for leaks.
Pressure loss ................................................ Damaged hydraulic cylinder. Isolate and pressurize to
check. Repair or replace.
Pressure loss ................................................ Faulty valves. Clean and reassemble, or, replace
control and release valves in manifold.
PROBLEM:
Cracking or breaking of lift arms.
POSSIBLE CAUSE
SOLUTION
Rough terrain .............................................. Improve road surface.
Overload ...................................................... Reduce trailer weight.
Lack of lubrication ....................................... Lubricate per maintenance instructions.
Worn shafts, bushings,
and housings ............................................. Replace
Incorrect pressure ........................................ Lifting circuit pressure should be 1,800 p.s.i.
PROBLEM:
Fifth wheel will not unlock properly.
POSSIBLE CAUSE
SOLUTION
Accumulated grease and
dirt in mechanism ..................................... Steam clean thoroughly and lubricate with light,
rust-resistant oil.
Insufficient lubrication ................................. Lubricate thoroughly with light, rust-resistant oil.
Faulty release air cylinder ............................ Replace air filter and/or cylinder.
Worn or damaged parts. ............................. Rebuild or replace.