JLG G12-55A Service Manual - Manual (Page 98)

Transmission
6-10 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 2.4,
“Fluid and Lubricant
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