Toro Reelmaster 4500–D Service Manual page 199

TEST NO. 8: Checking Charge Pressure For Traction
Procedure:
1. Hydraulic oil must be at operating temperature.
2. Install a 1000 psi gauge onto the quick disconnect at
the top of the pump package.
3. Start the engine and position throttle at idle
(1200 rpm).
TESTER READING TO BE APPROXIMATELY
75 – 150 PSI
4. If there is no pressure or pressure is too low, check for
restriction in pump intake line. Inspect charge relief
valve and valve seat. Check for sheared charge pump
key. Disassemble charge pump and check for internal
damage or worn parts. If the charge pump is in good
condition (no scoring, scratches, or excessive wear),
the general condition of the piston pump might be sus-
pected of wear and inefficiency.
Reelmaster 4500–D
Page 4 – 37
Figure 23
Hydraulic System