Fluid And Filter Change Procedure; Drain; Refill Transmission - PREVOST H3-41 Maintenance Manual

must be disabled. Prognostic information will
not be accurate with any other fluids or filters
and could result in missed maintenance activities
resulting in transmission damage. See "TABLE 3
for oil and filter
PROGNOSTIC MODE enabled.
IMPORTANT NOTE
A mixture of TES295 and TES389 fluid must
continue to use the TES389 fluid change
intervals, until two fluid changes with only
TES295 fluid have occurred, at which time the
TES295 schedule may be used.
Calendar-based change intervals of TABLE 3
must still be adhered to for both fluid and filter
changes even if Prognostics has not indicated the
need for either fluid or filter maintenance, unless
fluid analysis is used.
3.6 FLUID AND FILTER CHANGE
PROCEDURE

3.6.1 Drain

1. The transmission should be at an operating
temperature of 160ºF (71ºC) to 200ºF (93ºC)
when the oil is drained. This will ensure quicker
and more complete fluid drainage.
2. Remove the drain plug from under the
transmission (Figure 7) and allow the oil to
drain into a suitable container. Check the
condition of the oil as described previously.
3. Remove twelve bolts (item 1), two filter covers
(item 2), two gaskets (item 3), two O-rings
(item 4), two O-rings (item 5) and the two filters
(item 6) from the bottom of the control module
(Figure 7).
4. When reinstalling parts, lubricate and install
new O-rings (4) and (5) on each cover (2).
Lubricate O-ring inside filter (6) and push filter
onto cover (2). Install new gaskets (3) on
cover (2) and align holes in gaskets with holes
in cover.
CAUTION
Do not use bolts to draw the cover to sump.
This can damage the cover, seal, or sump.
5. Install filter and cover assemblies into the filter
compartment. Align
assembly with the holes in the channel
plate/sump. Push the cover assemblies in by
hand to seat the seals.
change intervals with
each filter/cover
SECTION 07: TRANSMISSION
6. Install twelve bolts and both covers.
TORQUE: 38-45 lb-ft (52-61 Nm)
7. Inspect the drain plug and O-ring. Replace if
necessary. Reinstall the drain plug.
TORQUE : 18-24 lb-ft (24-33 Nm)
FIGURE 7: DRAIN PLUG AND FILTERS
Fluid loss with filter change only
When changing main and lube filters at
recommended intervals, approximate fluid loss
for each filter as follows:
Main filter = 2 quarts (1.9 liters)
Lube filter =8 quarts (7.6 liters)

3.6.2 Refill transmission

The amount of refill fluid is less than the amount
used for the initial fill. Fluid remains in the
external circuits and transmission cavities after
draining the transmission.
NOTE
Quantities listed below are approximations and
do not include external oil cooler lines.
PA1621 Maintenance Manual All Series | January 2017
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