Eagle Tugs MTT 2012 Series, Parts And Service Manual

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QA014 REV06 08.04.12
M
AINTENANCE
M
AINTENANCE
The MTT Tractor features an accumulator backed brake system. This system stores hydraulic pressure in an accu-
mulator to provide continued braking in the event of a system power or fluid loss. Over time it is possible to lose
pre-charge pressure in the accumulator. If over time you find that the number of power off brake cycles is re-
duced, you may have a loss of accumulator pre-charge pressure.
In order to test the number of power off brake cycles, do the following:
1) Turn on the tractor
2) Repeatedly press and release the brake pedal until you hear the charge valve charge the brake accumulator
3) Turn off the tractor
4) Repeatedly press and release the brake pedal until you hear the charge valve release
You should have at least 5 power off brake cycles based on the test above.
The accumulator is located under the passenger seat floor above the front axle. Removal of the front RH wheel
and tire will allow access. Pre-charge rates should be checked if the power off brake performance is degraded. If
necessary, the accumulator should be pre-
charged back to factory specs per the accumulator manufacturer’s direc-­‐‑
tions. For recharge service please contact your local welding supply company.
MTT brake accumulator pre-charge rate: 750 psi
ACCUMULATOR MAINTENANCE