JLG X14J Compact Crawler Gearbox Disassembly Guide

Here is an illustration show you guide on how to disassembly gearbox for JLG X14J compact crawler.

 

Preparations:

JLG Technical Library Service Repair+Parts Manual 2020 Download

 

Procedures:

1.Unscrew the 4 socket head screws M8x45 (29),grade 12.9, and the 2 socket head screws M8x75 (54), grade 12.9, which fix the hydraulic motor to the gearbox.

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2.Remove the hydraulic motor from the flanged hub (15).

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3.Remove the O-ring seal (28) from the hydraulic motor seat.

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4.Remove the O-ring seal (16) from the brake port seat on the flanged hub (15).

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5.Mark the position of the springs (27) as a reference for the reassembling step.

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6.Take out the springs (27)

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Notice:

TIGHTEN NOS.2 SOCKET HEAD SCREWS M8X15 AND TWO SAFETYWASHERS INTO THE THREAD HOLES OF THE FLANGED HUB (15) BY A MALE HEX HEAD WRENCH. THIS STEP IS NECESSARY TOPREVENT THAT THE BRAKE PISTON (26) COMES OUT DANGEROUSLY DURING THE DISASSEMBLING PROCEDUREINDICATED AT THE FOLLOWING STEP

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7.Inflate compressed air into the brake port until the brake piston (26) comes out.

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8.Remove the brake piston (26).

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9.Remove the O-ring seals (23-24) and the backup rings (22-25) from their seats in the flanged hub (15).

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10.Take out the brake shaft (19).

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11.Remove the circlip (18) from the brake shaft (19).

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12.Take out the brake disc unit (20-21).

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13.Take out the sun gear (17).

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14.Turn the gearbox upside down and by using a screwdriver remove the circlip (1).

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15.Place the wrench into the plug (2), jack and remove the end cover (4).

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16.By using a puller remove the pad (3) from the end cover (4).
INFORMATION
THE ABOVE OPERATION MUST BE EXECUTE ONLY IN CASE OF REPLACEMENT OF THE PAD.

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17.Remove the O-ring seal (5) from its seat in the gearbox housing (9).

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18.By using pliers remove the circlips (6) from the planet assemblies (7).

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19.By using a puller remove the planet assemblies (7).

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20.By using pliers remove the circlip (8) from its seat in the flanged hub (15).

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NOTE: In order to proceed with the gearbox disassembly, it is now necessary to remove it from the ma-chine and bring it to a properly equipped workshop. By using a puller, push on the metal stopper and remove the flanged hub (15) from the gearbox housing (9).

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21.Fix the equipment (ATZ.05.014.0) at the bearing (14)

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22.By using a puller remove the bearing (14) remaining on the flanged hub (15).

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INFORMATION
IN CASE OF OIL LEAKAGES, IT MIGHT BE NECESSARY TO CHECK AND EVENTUALLY REPLACE THE
LIFETIME SEALS (14), WHICH MEANS BOTH THE METAL RINGS PARTS AND THE O-RING SEALS.

23.By using a screwdriver remove the half seal (14) from the flanged hub (15).

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24.Remove the O-Ring seal (13) from its seat in the gearbox housing (9).

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25.By using pliers remove the circlip (12) from its seat in the gearbox housing (9).

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26.By using a puller, push on the metal stopper and remove in the same time the spacer (11) and the bearing (10) from the gearbox housing (9).

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