Charge Pressure Test (Using Pressure Gauge) (Machine Serial Numbers Below 316000000) - Toro Groundsmaster 3280-D Service Manual

Charge Pressure Test (Using Pressure Gauge) (Machine Serial
Numbers below 316000000)
Groundsmaster ® 3280-D/3320
05138SL Rev B
A charge pressure test should be performed to identify if a worn or damaged
hydrostatic transmission is causing a hydraulic system problem.
Note: Before conducting charge pressure test, determine counterbalance
pressure setting for the machine; refer to the Traction Unit Operator's Manual.
1. Ensure that the hydraulic fluid is at normal operating temperature.
2. Park machine on a level surface with the cutting deck (or implement) lowered
and PTO switch off. Ensure that the engine is shut off. Set the parking brake
and block the front wheels to prevent machine movement.
3. Read all Warning, Cautions, and precautions listed at the beginning of this
section.
Before opening hydraulic system, operate all hydraulic controls to
relieve system pressure and avoid injury from pressurized hydraulic
fluid.
g230801
1. Seat base opening
g230802
1. Pipe plug
CAUTION
Figure 59
2. Check valve
Figure 60
Page 5–49 Hydraulic System: Testing the Hydraulic System
3. Pipe plug