TX 413 Service Manual
9-13
TESTING
Rev. 000
8. Then turn the restriction valve to 1100 psi (76 bar)
(Fig. 560).
Figure 560 DSC-2942
9. At 1100 psi (76 bar), note the gpm reading.
Example:
• 300 psi (21 bar) reading 8 gpm (30 l/min)
1st reading
• 1100 psi (76 bar) reading 6.5 gpm (24.6 l/min)
2nd reading
1.5 gpm (5.6 l/min)
(the difference)
Subtract the fi rst gpm reading from the second gpm
reading. This will determine your "fl ow droop".
Note: The acceptable gpm "fl ow droop" or
(difference) is 1.5 gpm (5.6 l/min).
If the difference exceeds these values, the hydrostatic
pump droop is not acceptable.
If the values have been met, the issue would be in the
wheel motor. Refer to Wheel Motor Removal, page
8-16.
10. Disconnect the fl ow tester and reconnect the
hydraulic lines when test is completed.
Note: Before reconnecting the hydraulic lines,
install new O-rings in the fi ttings.
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