Bendix Commercial Vehicle Systems AH-4 AIR HYD INTENSIFIER 4/04 User Manual
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3
FIGURE 2
3.19 MAX
.60
.74
3.12 REF
STROKE
8
9
11
10
DISASSEMBLY
Rotochamber from Master Cylinder FIGURE 1
1. Remove four cap screws (1), and remove the master
cylinder from the rotochamber.
Rotochamber
1. Remove the Gap screws (2) which hold the rotochamber
head in the shell and remove the head (6), return spring
(7), and spring guide (8).
2. Remove the nuts (3) from the body which secure the
outer clamp (4) to the body. On some units, one of the
mounting brackets is also retained by three of these
nuts.
3. Place body, open end down on bench and tap the ends
of the studs (5) with a brass drift, lead or plastic hammer.
The studs should be tapped on one side of the air inlet
and then the other alternately, to free the outer clamp.
4. Grasp the push rod and, by pulling and wiggling the
entire assembly consisting of push rod and plate,
diaphragm guide, diaphragm, inner and outer clamps
should ease out of the body.
5. Remove the outer clamp.
6. Remove nuts from inside of diaphragm guide.
7. Disassemble the inner diaphragm clamp, diaphragm,
push plate rod assembly, and diaphragm guide.
8. Remove the stroke warning switch from the rotochamber
head and bench test for electrical integrity. If OK, replace
in head.
DISASSEMBLY
Master Cylinder FIGURE 2
1. Clean exterior of master cylinder and drain any
remaining fluid, In the case of remote mounted reservoir,
drain and clean the reservoir.
2. Secure master cylinder in a vise. Depress piston (1)
Fig. 2, at least 1/2 in. and hold. This may be done with
a simple tool as shown in Figs. 3 and 4. Remove the
four self-threading bolts (9) securing the adapter block
or the reservoir to the master cylinder. Remove the
adapter block or reservoir and the compensating valve
(3) and spring (11).
CAUTION The compensating valve must be removed
before any attempt is made to remove the hydraulic
piston assembly (see Fig. 5).
3. Remove retaining ring (8) and stop washer (7).
4. Remove piston holding tool and remove piston (1) and
spring (4).
5. Remove cap nut (10) from adapter block. Remove o-ring
(2) from cap nut and compensating valve seal (5) from
adapter block or reservoir.
7
6
5
4
3
2
1