SkyTrak 6036 Service Manual - Manual (Page 249)

Section 9 Hydraulic System
Model 6036/6036T S/N 9B0500 thru 14833 9-99
Trouble Probable Cause Remedy
Boom Hoist or Extend
Function Drifts
Grille Tilt Slow or Mal-
functioning
Grille Tilt Drifts
Frame Tilt Slow or Mal-
functioning
Frame Tilt Drifts
Service Brakes Grab
Service Brakes Spongy
Defective counterbal-
ance valve or cylinder
seals
External fluid leakage at
tubes, hoses or fittings
Faulty relief valve setting
Internal leakage in cylin-
ders
Internal leakage in con-
trol valve
Defective tandem pump
Defective grille tilt or
slave cylinders
External fluid leakage at
tubes, hoses or fittings
Faulty relief valve setting
Internal leakage in cylin-
ders
Internal leakage in con-
trol valve
Defective tandem pump
Defective check valves
or frame tilt cylinder
Excessive hydraulic
pressure
Low disc brake oil
Brake pedal not adjusted
correctly
Air in brake line
Insufficient hydraulic
pressure
Repair or replace cylinders seals and/or counter-
balance valves as required (para 9.5).
Check and tighten connections at valves, pumps
and cylinders. Repair or replace faulty hose(s).
Check and set relief valve (para 9.2, 9.3, or 9.4).
Repair cylinders as required (para 9.5).
Repair control valve as required (para 9.2.1 or
9.3.1).
Repair tandem pump (para 9.7.1).
Repair or replace cylinder (para 9.5.8 and 9.5.7).
Check and tighten connections at valves, pumps
and cylinders. Repair or replace faulty hose(s).
Check and set relief valve (para 9.4.3).
Repair cylinders as required (para 9.5.9).
Repair control valve as required (para 9.2.1 or
9.3.1).
Repair tandem pump (para 9.7.1).
Repair or replace cylinder and check valves
(para 9.5.9).
Adjust pressure reducing valve (para 9.6.5 or
9.6.6).
Check and add oil to planetary wheel ends. Re-
fer to Operator's Manual.
Adjust pedal linkage (para 4.3.1).
Bleed brake lines (para 9.6.3.g).
Adjust pressure reducing valve (para 94.4 or
9.4.5).