Toro Greensmaster 3250-D 04383 Service Manual page 83

Procedure for Gear Pump (P1) Flow Test
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately ten
(10) minutes.
2. Park machine on a level surface with the cutting
units lowered. Make sure engine is off and the parking
brake is engaged. Make sure the hydraulic tank is full.
CAUTION
Before continuing further, read and become fa-
miliar with Precautions for Hydraulic Testing.
3. On gear pump (P1) (reel drive), disconnect the hose
that leads to port P1 on the hydraulic manifold.
4. Install tester with pressure gauge and flow meter in
series with gear pump (P1) and the disconnected hose.
Make sure the flow control valve on the tester is fully
open.
5. If a backlap kit is installed on the machine, make
sure backlap knob on the manifold block is in the mow
position and reel speed is set to maximum.
6. Make sure tester load valve is fully open before
starting the engine.
Greensmaster 3250--D
Do not engage the cutting units when performing
this test.
7. Start engine and move throttle to full speed (2750 +
50 RPM).
8. Watch pressure gauge carefully while slowly clos-
ing the flow control valve on the tester until 2000 PSI
(138 bar) is obtained.
9. Flow indication should be 5.4 GPM minimum. Re-
cord test results.
10. Open control valve on tester and shut off engine.
11. If flow was less than 5.4 GPM or a pressure of 2000
PSI (138 bar) cannot be obtained, check for restriction
in the pump intake line. If line is not restricted, remove
pump and repair or replace as necessary.
12. If testing is complete, disconnect tester from gear
pump and hose. Reconnect hose to the pump.
Page 4 - - 45 Rev. J
CAUTION
Hydraulic System (Rev. I)