Figure 3-4. Oil cooler, disassembly and reassembly.

TM 10-3930-242-34

Figure 3-4. Oil cooler, disassembly and reassembly.

NOTE

(1) Install retainer spring (21, fig. 3-7), re-

Effective with engines serial Nos. 42D-A036 and

tainer (20) (disked side up), O-ring (19) and seal

up, the blower end plates (10 and 17, fig. 3-7) are

washer (18) on the rotor shafts (22 and 23).

counterbored and use two teflon oil seals in each

(2) Place front end plate (10) on two wood

end plate in lieu of washer (18), O-ring (19), re-

b l o c k s ; then install the rotors, gear up, on the

tainer (20), and spring (21). The two teflon seals

end plate.

are pressed into the counterbore of the end plates

prior to reassembly.

NOTE

( 3 ) Install a retainer spring (21), retainer

To prevent inadequate lubrication or low oil pres-

sure, care must be exercised in the assembly of

(20), O-ring (19), and seal (18) on rotor shaft in

the front (10) and rear (17) end plates. The rear

t h e gear end of both rotors and install blower

end plate (17) does not have tapped holes for

housing (25) over the rotors.

thrust washer plate bolt (6) and no thrust washer

( 4 ) Place the rear end plate (17) over the

lubrication oil holes.