Testing The Traction Circuit - Hydraulic Pump Charge Pressure Test (Greenspro 1260) - Toro GreensPro 1240 Service Manual

Testing the Traction Circuit – Hydraulic Pump Charge Pressure
Test (GreensPro 1260)
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Test Procedure
Hydraulic System: Testing the Hydraulic System
The charge pressure test is the first in a series of two tests recommended
to determine traction circuit performance. Charge pressure testing involves
recording the charge pressure with the pump under no load (swash plates
closed) and comparing that reading to the charge pressure while the pump
is under a moderate load (swash plates open). A charge pressure drop of
more than 20% indicates an internal leak in the hydraulic pump. 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:
•
Hydraulic Pressure Test Kit (Toro part no. TOR47009)
•
Hydraulic Test Fitting Kit (Toro part no. TOR4079)
•
#8 SAE hydraulic plug (Toro part no. 353–550)
•
#8 ORFS swivel elbow (Toro part no. 94–6031)
•
Non-contact tachometer (phototach)
1. Ensure that the motion control pedals are correctly adjusted for the N
position. Also, ensure that the hydraulic pump is at full stroke when the
motion control pedals are moved to the full forward position.
2. Park the machine on a clean, level surface, shut off the engine, and engage
the parking brake.
3. Remove the transmission cover; refer to
(page 7–59)
Figure 21
Removing the Transmission Cover
Page 5–22
EUTRAL
GreensPro ™ 1240/1260
14211SL Rev A