Toro Sand Pro 2040Z Service Manual page 55

The groomer lift cylinder internal leakage test should be
performed if a groomer (rear attachment) raise and low-
er problem is identified. This test will determine if the lift
cylinder is faulty.
NOTE: Operation of the rear attachment on Sand Pro
2040Z machines will be affected by binding of the
groomer lift assembly, extra weight on the groomer lift
assembly and/or hydraulic lift cylinder binding. Make
sure that these items are checked before proceeding
with lift cylinder internal leakage test.
Procedure for Groomer (Rear Attachment) Lift Cyl-
inder Internal Leakage Test:
1. Perform the Implement (Lift) Relief Valve Pressure
and RH Transmission Gear Pump Flow tests to make
sure that relief valve and gear pump are functioning cor-
rectly (refer to test procedures in this section).
2. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately ten
(10) minutes.
3. Park machine on a level surface. With the engine
running, use the rear attachment switch to fully raise the
groomer lift assembly (lift cylinder rod is fully extended).
Turn engine off and engage the parking brake.
4. Support the groomer lift assembly in the raised posi-
tion to prevent it from lowering or shifting during testing.
5. Read and follow Precautions for Hydraulic Testing at
the beginning of this section.
IMPORTANT: Make sure to thoroughly clean around
all hydraulic connections that will be disassembled.
6. Place a drain pan under the groomer lift cylinder.
Clean and remove hydraulic hose from the 90
the rod end of the lift cylinder (Fig. 26). Plug the end of
the disconnected hose with a steel plug.
7. Remove all hydraulic oil from drain pan. Make sure
that empty drain pan remains under the open fitting of
the lift cylinder.
8. Make sure that motion control handles are in the
neutral locked position, the rear attachment switch is in
neutral and the parking brake is applied.
WARNING
Keep body and hands away from disconnected
hoses and fittings that might eject hydraulic fluid
under high pressure. Use paper or cardboard,
not hands, to search for leaks. Hydraulic fluid es-
caping under pressure can have sufficient force
to penetrate the skin and cause serious injury.
Sand Pro 2040Z
IMPORTANT: While performing test, do not press
rear attachment switch to lower as system damage
may occur.
9. Start engine and run at low idle speed. Have a sec-
ond person observe the open fitting on the groomer lift
cylinder. With the lift cylinder fully extended, momentari-
ly press the rear attachment switch to raise. If oil comes
out of the open fitting when the lift switch is pressed to
raise, the lift cylinder has internal leakage and should be
inspected and repaired as necessary (see Lift Cylinder
and Lift Cylinder Service in the Service and Repairs sec-
tion of this chapter). Check drain pan for any evidence
of oil that would indicate lift cylinder leakage.
10.Once the lift cylinder has been evaluated, shut en-
gine off and wait for all machine movement to come to
a complete stop.
11. After testing is complete, remove plug from the dis-
connected hydraulic hose. Reconnect hose to the lift
cylinder fitting.
12.If groomer lift problems exist and the groomer lift cyl-
inder, implement (lift) relief valve pressure and RH
transmission gear pump flow tested acceptably, consid-
er that the hydraulic control manifold requires service
(see Hydraulic Control Manifold and Hydraulic Control
Manifold Service in the Service and Repairs section of
this chapter).
13.Make sure hydraulic reservoir is full before returning
machine to operation.
o
fitting on
1. Groomer lift assembly
2. Groomer lift cylinder
Page 4 - 25
3
FRONT
2
Figure 26
3. Rod end fitting
Hydraulic System
1