Service Manual

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Hydraulic

System

Reelmaster 5500-D Hydraulic System (Rev. C)Page 4 - 29

TEST NO. 2: Traction Circuit System Relief Pressure

1. Make sure hydraulic oil is at normal operating tem-

perature by operating the machine for approximately 10

minutes.

2. Before doing traction pressure test:

A. Drive machine to an open area, lower cutting

units, turn the engine off and engage the parking

brake.

B. If testing forward function, connect a chain to the

rear frame tie-down brackets. Connect the other end

of the chain to an immovable object and remove all

slack from the chain. If testing reverse function, at-

tach chain to the center of the front frame member

(Fig. 15).

Note: On 4WD models, the driveshaft and driveshaft

bearing support must be removed to access the reverse

test port.

CAUTION

Prevent personal injury and/or damage to equip-

ment. Read all WARNINGS, CAUTIONS, and Pre-

cautions for Hydraulic Testing at the beginning

of this section.

Note: Test ports are 7/16-20 SAE O-ring ports.

3. Connect a 5,000 psi (350 Bar) gauge to traction cir-

cuit test port for function to be checked (Fig. 15).

4. Start the engine and move throttle to full speed (3200

RPM).

5. Sit on seat, and with brakes engaged, slowly de-

press the top of traction pedal. While pushing top of trac-

tion pedal down, look at pressure reading on gauge.

GAUGE READING:

Forward: 3450 to 3750 PSI (237.9 to 258.6 bar)

Reverse: 2600 to 2900 PSI (179.3 to 200 bar)

6. If traction pressure is too low, inspect check/high

pressure relief valves.

Note: Clean or replace valves as necessary. These

cartridge type valves are factory set, and are not adjust-

able. If check/relief valves are in good condition, replace

or overhaul transmission.

Note: The forward and reverse check/high pressure

relief valves are different. One valve cartridge has a ma-

chined groove on seating surface and must be installed

in the ”reverse” port (see Check and High Pressure Re-

lief Valves in Transmission Repairs section).

1. Front frame member

Figure 15

1. Forward test port 2. Reverse test port

Figure 16