022-00028AE Operation and Maintenance Manual Inspection, Maintenance and Adjustment 4-47
3. Without starting engine, operate controls to dump bucket. (Figure 86). Then operate controls to lower
boom. (Figure 87). This will drain oil out of boom and bucket cylinders.
4. Replace full flow hydraulic filters as described under “Hydraulic Full Flow Filter Replacement” on
page 4-30.
5. Install reservoir drain plug. Remove upper cover of hydraulic oil tank. Refill reservoir by pouring oil in
through upper cover opening. Install and tighten upper cover.
6. Start engine and operate controls to raise and lower bucket a few times. (Figure 88). Raise and lower
boom a few times. (Figure 89). Lower bucket to ground.
7. Check reservoir sight gauge. (See Figure 10 on page 4-10). Oil level must be between upper limit and
lower limit on sight gauge. Remove breather cap and add oil if necessary.
CHECK BRAKE ACCUMULATOR
Test the brake accumulator for proper precharge of Nitrogen gas:
1. Park the machine on a level surface, apply the parking brake, lower the attachment to the ground.
2. Run the engine at low idle for five minutes to fill the brake accumulator with oil.
3. Shut down engine.
4. Turn the starter switch to the "ON" position.
5. Count the number of times you can depress the right hand brake pedal before the brake warning light
comes on.
6. If the number counted is less than five (5), there is some problem with the accumulator. Contact your
nearest Daewoo dealer.
WARNING!
Pressurized Nitrogen gas in brake accumulator may explode causing serious injury or death.
Never service brake accumulator unless properly trained.
Figure 88 Figure 89
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