JLG G12-55A Service Manual - Manual (Page 104)

Transmission
6-12 G10-55A, G12-55A
7. Oil leaking from
transmission.
1. Oil leaking from vent (high oil level). 1. Remove drain plug and drain oil as
needed, until oil is at correct level. Refer
to Section Note:, “Friction Modifier
required for axle differentials, see
Section 2.5.3, “Capacities.”.” Replace o-
rings as needed and tighten plugs to
96 lb-ft (130 Nm).
2. Drain plug loose and/or o-rings
damaged or missing.
2. Replace o-rings as needed and tighten
plug to 26 lb-ft (35 Nm).
3. Hose fittings loose. 3. Tighten fittings.
4. Oil leaking at valve bodies
(possible valve body gaskets
damaged or missing and/or mounting
capscrews not tight).
4. Replace gaskets and/or tighten
capscrews to 7 lb-ft (9,5 Nm).
5. Housing capscrews loose. 5. Tighten capscrews to 34 lb-ft
(46 Nm).
6. Oil leaking at pump (possible
pump-to-housing o-rings missing or
damaged, and/or pump mounting
capscrews not tight).
6. Replace o-rings and/or tighten
capscrews to 85 lb-ft (115 Nm).
7. Oil leaking at converter bell
(possible converter leak and/or
input shaft seal damage).
7. Replace converter and/or input
shaft seal.
8. Oil leaking at output shaft (output
shaft seal damaged).
8. Replace output shaft seal.
9. Oil escaping from breather at
shut down.
9. Transmission may be under full. Ensure
transmission is at operating
temperature, 185° F (85° C) and fill to
upper mark on transmission dip stick.
10. Housing damaged. 10. Replace housing as needed.
Problem Cause Remedy