Testing The Optional Attachment Circuit - Attachment Pump (P3) Flow And Circuit Relief - Toro Sand Pro 3040 Service Manual

Testing the Optional Attachment Circuit – Attachment Pump (P3)
Flow and Circuit Relief
Test Procedure
Hydraulic System: Testing the Hydraulic System
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Optional Attachment Circuit – Attachment Pump (P3) Flow and Circuit Relief
A remote rear hydraulics kit (model 08781) is available for both Sand Pro 3040
and 5040 machines to support the hydraulic needs of various rear attachments.
A hydraulics switch kit (model 08783) is available for Sand Pro 5040 machines
to support the hydraulic needs of various front and rear attachments. Each kit
includes its own fixed displacement gear type hydraulic pump (P3) driven directly
by the engine. The Attachment Pump (P3) Flow Test compares fluid flow at No
Load with fluid flow Under Load. A drop in flow under load of more than 15%
indicates the gears and wear plates in the pump have worn. Continued operation
with a worn pump can generate excessive heat and cause damage to the seals
and other components in the hydraulic system.
The relief valve for the remote rear hydraulics kit (model 08781) is part of the
solenoid valve on the kit hydraulic manifold. The relief valve for the hydraulics
switch kit (model 08783) is a separate cartridge style valve on the kit manifold.
Special Equipment Required:
•
Flow meter with pressure gauge that has at least a 32 liter/minute (10
gallons/minute) capacity.
•
2 hydraulic test hoses with quick-disconnect fittings
•
Non-contact tachometer (phototach)
1. Park the machine on a level surface, lower any attachments, engage the
parking brake, and set the key switch to the O
Figure 44
Page 5–48
position.
FF
Sand Pro ® 3040 and 5040
20251SL Rev A