Truma Powrtouch Freedom RV, Instructions Manual

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Issue 1 – January 2020 Page 11
3.5 MECHANICAL ASSEMBLY
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For safety reasons it is recommended that the fitting of the Powrtouch Freedom
should be undertaken on a flat hard surface . Before raising the RV, ensure the handbrake
is on and then it can be raised as required (using trolley jack and/or axle stands) and secured
in position using the RV steadying legs with supporting blocks and wheel wedges as
necessary; it is then helpful to lay down a ground sheet. Remove all items from the packaging
onto the protective sheet. Ensure both rollers are in the DISENGAGED position, as the unit will
not fit correctly otherwise. Loosely assemble the left-hand motor unit, right hand motor unit and
alignment tube and place under the RV.
Wherever possible the Single Axle Powrtouch Freedom should be fitted in front of the RV road
wheels, if this is not possible then it is acceptable to fit the unit behind the road wheels.
Using appropriate support blocks raise the loosely assembled unit into an approximate
position, fit the clamps and U-Bolts (see Fig 3) to the chassis (do not tighten at this point).
Adjust to the correct place using the 19mm (0.74 inches) spacer provided between the tire and
the drive roller (on each side of the). Please note the spacer block should be a sliding fit
between the tire and the coarse drive roller.
Also adjust the position of the drive rollers in relation to the tires by sliding the motor units on
the alignment tube until the maximum amount of roller is in contact with the tire tread without
any part of the unit fouling the tire or chassis. It is advisable to leave a minimum 10mm (0.39
inches) gap between the Powrtouch Freedom unit and the inside wall of the tire, this is to allow
for the expansion of the tire when the rollers are engaged. Before tightening the u bolts to the
recommended torque of 35 ft lbs, tighten the alignment tube pinch bolts and lock nuts making
sure the alignment tube is approximately centralised; it is then advisable to check the roller /
tire gaps again. The assembly should then be secured by tightening the U-bolts to the
recommended torque of 35 ft lbs using a torque wrench.
Check both the above alignments at least once during the process and on completion .
Once the motor assemblies are completed the stop blocks should now be fitted on the chassis
in a position directly behind the Powrtouch clamping plates to ensure that the motor
assemblies do not slide along the chassis away from the tires when the drive rollers are
engaged to the tires (see Fig. 3). Once correctly positioned they can be tightened using the
locking bolt and nut with a torque wrench spanner set at 35 ft lbs.
FIG 3: CLAMP ASSEMBLY WITH STOP BLOCK