Service Manual User guide

Table Of Contents

Supply, Pressure, and Return Hydraulics

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Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K

• Brakes – Used for reading pressure of the brake circuit and is used to

indicate when pressure is eliminated from the system prior to discon-

necting hydraulic hoses. Pressure limit is 330 psi.

• Steering – Used for reading pressure of the steering circuit. Pressure

limit is 2200 psi.

• Pilot – Used for reading pressure of the joystick circuit. Pressure limit

is 450 psi.

• Accum. – Used for reading of pressure in the accumulator charging

circuit. Pre-charge pressure is 400 psi. The low pressure limit is 1200

psi and the high pressure limit is 1600 psi.

CAUTION: To ensure that system is kept free of dirt and contamination,

always cap all ports when not in use.

Roll-Back Hose Tray

General

Fig. 5-60: Roll-Back Hose Frame Location - Control Manifold Hydraulics

(Ref. Fig. 5-60) The roll-back hose tray is located near the middle of the

machine, above the valve plate. It is used with models 644B, 844C, and

1044C.

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