© Jun 2022 5-28 TB24 Plus&26J Plus Maintenance Manual
MAINTENANCE PROCEDURES
3. Ensure the battery cable connections are not
corroded.
Note: Adding a terminal protector and anti-
corrosion sealant will prevent the terminals and
cables from corrosion.
The instructions below are applied only for batteries
requiring maintenance：
4. Wear goggles, gloves and protective clothing.
5. Remove the ventilation cover.
6. Top up the liquid gravity meter and drain it for two or
three times, then take a sample from the battery
electrolyte.
7. Measure the specific gravity of all battery cells in
sequence and note down the readings.
8. If the ambient temperature is above 27℃ (80°F),
add 0.004 to calibrate the specific gravity reading
for every 5℃ (40°F) higher; if the ambient
temperature is below 27℃ (80°F), subtract 0.004 to
calibrate the specific gravity reading for every 5℃
(40°F) lower.
• Result 1: if the specific gravity reading of each
battery cell is 1.250 or higher, and the difference
in the specific gravity readings is less than
0.050, proceed with the next step.
• Result 2: if the specific gravity reading of one or
more battery cells is below 1.250, it indicates the
battery is running low and needs charging. After
charging, measure the specific gravity, and if the
Result 1 is obtained, proceed with the next step.
• Result 3: if the difference in the specific gravity
readings of any battery cells is greater than
0.050, equalize the battery pack and hold it still
for 6 hours before re-measurement of the
specific gravity. If the Result 1 is obtained,
proceed with the next step.
Note: if the Result 1 cannot be obtained even after
many attempts, the battery may have malfunctions.
9. Check the battery electrolyte level, and add distilled
water to the required level if needed.
10. Install the ventilation cover to the battery.
B-20 Test Oscillate Outriggers
TIPPING HAZARD
To perform this test, the machine
must be in stowed position.
1. Inspect the tie rod of multi-way valve is properly
secured before machine startup.
2. Start the machine at the platform controller.
3. Drive the machine to allow the right steer wheel
upon the kerb or a block with thickness of 12cm (4.7
in).
4. The other 3 wheels of the machine should come in
close contact with the ground.
5. Drive the machine to allow the left steer wheel upon
the kerb or a block with thickness of 12cm (4.7 in).
6. The other 3 wheels of the machine should come in
close contact with the ground.
7. Drive the machine to allow the both steer wheels
upon the kerb or a block with thickness of 12cm (4.7
in).
8. The non-steer wheels of the machine should come
in close contact with the ground.
B-21 Test Drive Speed
1. Move the engine start switch on the platform
controller.
2. Depress the foot switch.
3. Slowly push forward the drive/steer control handle
to full drive speed.
4. Move the engine high/low speed select switch on
the platform controller to select the engine high
speed.
5. Move the drive high/low speed select switch on the
platform controller to select the drive high speed.
6. The test results should be as shown in the table
below:
Table 5-13
POSITION MAX DRIVE SPEED
Operating 1.1km/h (0.68mph)
Non-operating 4.8km/h (3mph)
NOTICE
If the drive speed exceeds the test results as shown
above by 10%, please immediately tag the machine
and remove it from service.
B-22 Inspect Emergency Lowering
When the engine/motor fails, depending on the actual
conditions, move the emergency power switch on the
ground or platform controller to start the hydraulic
pump, and meanwhile move the function switch to
enable the boom lowering, retracting and rotating.
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