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Maintenance - Section 4
Page 4-10
HYDRAULIC TANK SERVICE
Filling Instructions
1. Lower the dump body, shut down the engine, and
turn the keyswitch ''Off''.
Hydraulic tank may be pressurized! Depress relief
valve (2) and release hydraulic tank filler cap slowly
to remove any internal pressure.
2. Depress relief valve (2, Figure 4-1) for 30 - 45
seconds to release any internal tank pressure.
Turn the oil filler cap (4) slowly counterclockwise
to release any posssible residual tank pressure.
3. Refer to ''Lubrication Chart'', Lube key ''C''.
Fill tank with recommended oil, until oil is visible in
the TOP sight glass (5).
NOTE: If Hydraulic tank has been completely
drained, refill capacity is: 576 Liters (152 gal.)
4. Replace fill cap.
5. Start the engine, and raise and lower dump body
3 times to circulate oil and fill all lines, valves,
cylinders, etc.
6. Repeat steps 1 through 5 and fill until oil level is
again in the TOP sight glass (5).
7. If oil level falls below LOWER sight glass (6) with
engine running, repeat steps 1. through 5.
HYDRAULIC TANK SERVICE
When servicing the hydraulic tank, always follow
the ''Filling Instructions'' described above to re-
lieve any internal tank pressure before opening
tank.
1. When checking oil level, or any other service,
inspect the breather (3, Figure 4-2) to be certain
that it is open to atmosphere.
Clean any excess accumulations of dirt/mud, etc.
from around the breather.
Clean/replace breather element as necessary.
Refer to ''HYDRAULIC TANK BREATHER''.
2. Whenever oil is drained from tank, clean diffussers
(7 & 11) and strainers (8, 9, & 10).
FIGURE 4-1. HYDRAULIC TANK
1. Hydraulic Tank
2. Pressure Relief Valve
3. Breather
4. Filler Cap
FIGURE 4-2. HYDRAULIC TANK (TOP VIEW)
1. Hydraulic Tank
2. Pressure Relief Valve
3. Breather
4. Filler Cap
5. Sight Glass Guard
6. Access Cover
OM4006.1 06/98
Lubrication and Service
5. Hydraulic Oil Level
Upper Sight Glass
6. Hydraulic Oil Level
Lower Sight Glass
7. Hydraulic Oil Drain
7. Diffusers
8. Strainers
9. Wire Mesh Strainer
10. Strainer
11. Diffuser
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