Procedure for Cutting Deck Motor Case Drain
Leakage Test
5. Sit on seat and start the engine. Move throttle to full
speed (2870 RPM). Move PTO switch to ON.
NOTE: Over aperiod oftime,adeck motor can wear in-
ternally. A worn motor may by--pass oil to its case drain
causing the motor to be less efficient. Eventually,
enough oil loss will cause the deck motor to stall under
heavy cutting conditions. Continued operation with a
worn, inefficient motor can generate excessive heat,
causedamage toseals andother components inthehy-
draulic system and affect quality of cut.
6. While watching pressure gauge, slowly close flow
control valve on tester until a pressure of 1200 PSI (83
bar) is obtained.
NOTE: Use a graduated container, special tool
TOR4077, to measure case drain leakage (Fig. 37).
7.
drain line for 15 seconds, then move the PTO switch to
Have a second person collect the flow from the case
OFF and stop the engine. Record test results.
NOTE: One method to find a failing or malfunctioning
deck motor is to have another person observe the ma-
chine while mowing in dense turf. A bad motor will run
slower, produce fewer clippings and may cause a differ-
ent appearance on the turf.
TESTRESULTS:Flowlessthan16ounces(473ml)
of hydraulic fluid in 15 seconds.
8.
If flow is more than 16 ounces (473 ml), the motor
is worn or damaged and should be repaired or replaced.
1.
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes. Make sure the hydraulic tank is full.
9.
After testing is completed, disconnect tester from
motor and hose. Reconnect hose to thedeck motor.Re-
move cap from tee--fitting and reconnect case drain
hose.
2.
Park machine on a level surface with the cutting
decks lowered and off. Make sure engine is off and the
parking brake is applied.
3
CAUTION
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
2
1
NOTE: The side deck motors are connected in series.
To isolate a faulty motor, both motors in the circuit may
have to be tested by starting with the left side motor first.
3.
Disconnect hose from return of the motor to be
Figure 36
tested (Fig. 36). Install flow tester in series with the mo-
tor and disconnected return hose. Make sure the flow
control valve on tester is fully open. (Fig. 37).
1.
2.
Deck motor (RH shown)
Return hose
3.
Case drain hose
4.
Disconnect the motor case drain hose (small diame-
ter hose)where itconnects tohydraulic manifold tee--fit-
ting (not at the motor). Put a steel cap on the fitting at the
tee--fitting; leave the case drain hose open (Fig. 37).
CAUTION
Cutting deck blades will rotate when lowered
with PTO switch in ON position. Keep away from
cutting decks during test to prevent personal in-
jury from rotating blades. Do not stand in front of
the machine.
Figure 37
Groundsmaster 4000--D
Page 4 -- 47
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 30412, Toro Groundsmaster 4000 D |
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| Document Type | Catalog |
| Language | English |
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