BENDIX AH-4 AIR HYD INTENSIFIER Manual - Page 5

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3. Install the new o-ring (2) on the cap nut after lubricating

with the fluid to be used in the master cylinder or Dow

Corning 55-M pneumatic grease. Thread the cap nut in

the adapter block and torque to 300 inch pounds.

4. Coat the new compensating seal (5) with fluid or Dow

Corning 55-M pneumatic grease and install in mating

grooves in bottom of adapter block or reservoir.

5. Coat bore in master cylinder with fluid to be used, place

spring (4) in piston assembly (1 ) and slide both into

bore of master cylinder (fig. 6).

FIGURE 6

6. Place the stop washer (7) and retaining ring (8) over the

center post of the retaining tool, depress the piston (1)

(see Fig. 7). Make certain the retaining ring is properly

seated in its corresponding groove in the master cylinder

casting (see Fig. 8). CAUTION - Keep retaining tool

in place until step 8 is completed!!

FIGURE 7

7. With piston still depressed, install compensating spring

(11 ) and compensating valve (3). Set adapter block (or

reservoir) in place. The master cylinder casting should

preferably be held in a horizontal position for this

operation. Start the four self-threading bolts (9) by hand

to prevent cross threading and torque to 150- 200 inch

pounds. Care should be taken that the compensating

valve is properly located before the adapter block

or reservoir is located and snugged down (Fig. 9).

The piston may now be released by removing the

retaining tool.

FIGURE 8

8. A simple check may be made to determine that the

compensating valve is properly installed. Apply air

pressure on the discharge port of the master cylinder.

With the piston released, air should back flow through

the compensating valve and out the adapter fitting or

reservoir. Depress the piston at least 1/4 in. Air pressure

should now be trapped in the master cylinder and there

should be no evidence of back flow out the adapter

block or reservoir.

FIGURE 9

CAUTION - 50 psi air pressure will create approximately

100 pounds of additional reactive force on the piston.

The piston retaining tool should, therefore, be used for

this test.

9. Install the master cylinder on the rotochamber with four

3/8 in. cap screws torqued to 300 inch pounds.