Manitou AETJ 43 - Compensation;Tilting Circuit - Problem Solving; Test Procedure

HYDRAULIC
52
70
547379EN
70 (08/03/2017)
70.3.6 COMPENSATION/TILTING CIRCUIT  PROBLEM SOLVING
- If the basket does not remain in position and drops under gravity
when the access platform is not in operation, perform the following
test procedure.
TEST PROCEDURE
- Decompression of the compensation/tilting circuit (670.3.11
CYLINDERS  REMOVAL, 5 60)
- Switch o the power to the access platform.
- Take a drain pan and place it under the compensating cylinder.
- Identify the hoses connected to the compensating cylinder lower
chamber (1, 070  27) and remove them.
- Take a straight coupler and connect the hoses from the lower
chamber.
- Perform the same procedure for the hoses for the upper chamber
(2, 070  27).
- Remove the hoses (1, 070  28) connected at A5 and B5 from the
distributor block.
- Insert tee couplings between the distributor block and the hoses
(2, 070  28).
- Take a 0 - 200 bar (0-2900.75 psi) manometer (3, 070  28) and
connect it to the left-hand tee coupling: outlet A5.
- Take a 0 - 100 bar (0-1450.38 psi) manometer (4, 070  28) and
connect it to the right-hand tee coupling: outlet B5.
- Switch on the access platform.
- Tilt the basket and jib to their maximum extent (1, 070  29) several
times from the base control panel to pressurize the hydraulic circuit.
- Place the basket in the horizontal position.
- Switch o the power to the access platform.
- Note the pressure readings displayed by the two manometers.
- Check that the basket does not drop.
NOTE: This procedure may take a long time (several hours).
70 - 27
1
1
2
2
B5
0 0
0
A5
70 - 28
4
3
1
1
2
2
70 - 29
1
1