SANY SY155U, Руководство по эксплуатации и обслуживанию, Страница: 148 / 192

5-38
MAINTENANCE
SY155U Excavator OMM
10. Install the battery hold-down bracket over the
batteries and secure it in place by tightening the
fastener.
11. Install the jumper cable to the batteries.
12. Connect the red positive (+) cables first. Connect the
black ground (-) cables last.
NOTE: The two 12-volt batteries are connected in a
series. Be sure they are installed in the same
manner.
13. Install the cover and secure with the fasteners.
Hydraulic System
Inspect the Accumulator
1. Prepare the machine for checks and inspections.
See “Maintenance Safety” on page 2-5.
2. Open the appropriate access covers or compartment
doors. See “Doors, Panels, Covers, and Filler Cap”
on page 4-5.
3. Turn the battery disconnect switch to OFF. See
“Battery Disconnect Switch” on page 3-15.
0003562
Figure 5-73
4. The accumulator (1) is inside the front right access
door.
5. Inspect the accumulator and surrounding surfaces
for signs of leaks and worn or damaged hoses.
6. If any damage is found, repair it immediately.
Check the Accumulator Function
WARNING
• The accumulator contains pressurized nitrogen.
Improper handling is extremely dangerous.
• Do not drill holes in the accumulator or place it
close to fire or a high-heat source.
• Do not weld any part on the accumulator.
• Air in the accumulator must be released upon
disposal.
• See “Accumulator” on page 2-6 for special
precautions that need to be taken when working
with or around the accumulator. Contact a SANY
dealer for additional information.
Failure to follow these warnings could result in
death or serious injury.
The accumulator allows the operator to lower hydraulic
equipment within 15 minutes of an engine shutdown with
the key switch in the ON position.
1. Prepare the machine for checks and inspections.
See “Maintenance Safety” on page 2-5.
2. Lower the work equipment to 18 in.-24 in.

(0.45m–0.6m) from the ground.
3. Shut down the engine.
4. Turn the key switch ON.
0003556
Figure 5-74
5. Move the hydraulic lockout control lever (1) to the
unlocked (open) position.
6. Use the joystick control to lower the boom.
7. The boom should lower.
NOTE: If there is no movement, contact a SANY dealer.
8. Start the engine and run it at low idle for about 5
minutes to repressurize the accumulator.
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1