Komatsu 830E-AC Shop Manual page 564

FIGURE 3-6. VALVE BODY SEAL INSTALLATION
1. Actuator Plunger
2. Valve Body
3. Poly-Pak Seal
Valve Body Seal Installation
1. Install the poly-pak seal (3, Figure 3-6) in the
seal groove first. Position the seal in the groove
so that the internal O-ring inside the poly-pak
seal is facing down toward the bottom of the
valve.
2. Make sure the internal O-ring is still seated
inside the poly-pak seal (3) and did not get dis-
lodged during installation. Position the poly-pak
seal to the bottom of the groove.
3. Install the orange back-up ring (4) on top of the
poly-pak seal. Start by hand and then continue
to work into the groove either by hand or by
using an O-ring installation tool.
4. Install the wiper seal (5) in the top counterbore.
Position the seal in the groove so that the regis-
ter lip is facing up toward the actuator.
5. Repeat Steps 1- 4 for the second bore.
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4. Back-Up Ring
5. Wiper Seal
6. Actuator Base
Brake Circuit Component Service
FIGURE 3-7. SLEEVE SEAL PLACEMENT
1. Back-Up Ring
2. O-Ring
3. Regulator Sleeve
Regulator Sleeve O-Ring Installation
1. Install O-ring (2, Figure 3-7) onto the smallest
groove (on the top) of the regulator sleeve (3).
Install O-ring (5) onto the middle groove on the
regulator sleeve. Install O-ring (6) onto the larg-
est groove (on the bottom) on the regulator
sleeve.
2. Install a split nylon back-up ring (4) onto each
side of O-ring (5) located in the middle of the
regulator sleeve.
3. Install one split nylon back-up ring behind the
O-ring (2) located at the top end of the sleeve.
This O-ring is the smallest of the three O-rings.
Position the back-up ring so that it is next to the
top of the regulator sleeve. The top of the
sleeve is the end with the smallest O.D.
4. Repeat Steps 1-3 for the second regulator
sleeve.
4. Back-Up Ring
5. O-Ring
6. O-Ring
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