Toro Groundmaster Series Service Manual page 112

Test Procedure
g299124
1. Main hydraulic manifold
2. Diagnostic fitting – G2 port
Hydraulic System: Testing the Hydraulic System
The charge pressure test is the first in a series of tests recommended to
determine traction circuit performance. A charge pressure drop of more than
20% when a moderate load is placed on the piston (traction) pump indicates
an internal leak in the piston (traction) pump. Reduced charge pressure may
also indicate a faulty relief valve (R4) in the steering control unit. Continued
unit operation can generate excessive heat, cause damage to seals and other
components in the hydraulic system, and affect overall machine performance.
Special Equipment Required:
•
Pressure Gauge (accurate below 300 psi) with hose and quick disconnect
coupling
•
Flow meter with pressure gauge that has at least a 114 L/minute (30
gallons/minute) capacity.
•
2 Hydraulic Hoses
1. Park the machine on a level surface, lower the cutting unit (or attachment),
and set the key switch to the O
2. Read and adhere to the information provided in
(page 5–22).
3. Ensure that the traction pedal is correctly adjusted for the N
refer to Adjusting the Traction System for Neutral (page
that the hydraulic pump is at full stroke when traction pedal is pressed fully in
forward position.
4. Connect a hydraulic pressure gauge to the diagnostic fitting at the main
hydraulic manifold G2 port.
position.
FF
Figure 29
3. Hydraulic pump (P1)
4. Hydraulic tube
Page 5–26
Testing the Hydraulic System
position;
EUTRAL
5–50). Also, ensure
Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A