MOUNTING THE APU ON THE CHECK STAND.

TM 55-4920-424-13&P

3-1.

GENERAL

3-2. The Mobile Check Stand is a control unit providing a mounting platform, electrical controls, and components

necessary for operating the models T-62T-40-1 and T-62T-2B auxiliary power units. The check stand, independent of the

APU, cannot be turned on or off. Its components function only as a part of the power unit. The starting and stopping

procedures given in this section are for the purpose of operating and testing the auxiliary power unit.

3-3.

MOUNTING THE APU ON THE CHECK STAND.

CAUTION

Place removed APU components in a safe place to prevent loss. These parts will

be reinstalled on APU after removal of unit from check stand.

3-4.

To mount the APU on the check stand.

a. Preparation.

(1) Prepare stand, battery, and fuel system for use. Refer to Section II for preparation procedures.

(2) Position check stand and set hand brake (pull brake handle up.)

(3) Select the appropriate front mounting bracket (Refer to Fig. E-5) for your APU and position on mounting rail.

b. Mounting the APU.

Note

Before mounting the U/EH-60 APU with purge valve, disconnect the PCD air line, if

installed, and start fuel supply line from the Purge Valve assembly. Otherwise this

will prohibit exhaust end mounting.

(1) Using a suitable hoist assembly, or lifting device (refer to fig. E-6), APU over the test stand brackets.

Lower APU until aft (exhaust) mounting holes are aligned and loosely install mounting bolts. Continue lowering APU until

front support pins can be installed and secured with two bolts each.

(2) Tighten ALL mounting bolts (Refer to Fig E-7).

Change 2 E-15