Reel Circuit Testing − Reel Motor Efficiency/Case Drain Test - Toro Reelmaster 3100-D Service Manual

Reel Circuit Testing − Reel Motor Efficiency/Case Drain Test
OR4077
g345040
Reelmaster ® 3100-D/3105-D
20252SL Rev A
Model 03171 (shown)
The reel motor efficiency/case drain test is the second in a series of tests
recommended to check cutting unit circuit performance. Over a period of time,
a reel motor can wear internally. This test measures case drain volume while
restricting flow across the motor ports. Case drain volume under load of more
than 9% of total motor flow indicates the gears and wear plates in the motor
have worn. A worn motor may by−pass hydraulic fluid to its case drain causing
the motor to be less efficient. Eventually, enough fluid loss will cause the reel
motor to stall under heavy cutting conditions. Continued operation with a worn,
inefficient motor can generate excessive heat, cause damage to seals and other
components in the hydraulic system, and affect quality of cut.
Note: One method to find a failing or malfunctioning cutting unit motor is to have
another person observe the machine while mowing in dense turf. A bad motor
will run slower, produce fewer clippings and may cause a different appearance
on the turf.
Special Equipment Required:
•
Flow Meter with Pressure Gauge that has at least a 45 LPM (12 GPM)
capacity
•
Phototach (non−contact tachometer)
1. Make sure that the hydraulic fluid is at normal operating temperature by
operating the machine for approximately 10 minutes. Make sure the hydraulic
tank is full.
Figure 48
Page 5–43 Hydraulic System: Testing