Service Manual User guide

Supply, Pressure, and Return Hydraulics
5-6 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
• Hydraulic oil leakage at any threaded or clamped joint that cannot be
eliminated by normal tightening.
• Evidence of excessive abrasion or scrubbing on the outer surface of
hose or hoses.
Important: When tightening loose lines or connections, use two wrenches to
avoid twisting hose or tubes. Tighten loose connections only until the
leak stops. An over-tightened fitting may result in overstressing and/or
cracking. Replace any connectors that continue to leak. See
“Hydraulic Fitting Torques” in Section 3 for torque specifications for
hydraulic fittings and hydraulic line connections.
Hydraulic Reservoir
Description
Fig. 5-4: Hydraulic Reservoir Location
(Ref. Fig. 5-4) The hydraulic reservoir is mounted on the right-hand side of
the machine and is located next to the fuel tank. It has a capacity of 53
gallons. The major components associated with the hydraulic reservoir are:
• Hydraulic Tank Breather
• Hydraulic Tank Sight Gauge
• Pressure Gauge
• Hydraulic Oil Return Filter
• Hydraulic Oil Strainer.
A breakdown of hydraulic reservoir parts is shown in Fig. 5-5.
K1090