955K TRACK-TYPE LOADER POWER TRAIN Caterpillar

Transmission And Torque Converter

Usage:

Transmission Removal And Installation

1-Forged eyebolts (two 5/8" - 11 NC) (one 1/2" - 13 NC). Install and attach a hoist. 2-Transmission case-to-adapter bolts (ten). 3-Support bracket-to-frame bolts (two-not shown). 4-Transmission output shaft. Move transmission forward to clear output shaft before raising. Raise transmission about 3 in. (76,2 mm). 5-Support bracket.

6-Eyebolt and chain. 7-Transmission. Remove by tipping as shown.

6. Move the forward chain and eyebolt from the top of the torque converter housing to the top of the transmission mounting flange as shown.

Removing Transmission From Case

1. Position the transmission vertically on a suitable stand or blocks.

2, 3, 4, 5-Bolts. Do not remove. 6-Bolts (two). Replace with 5/8" - 11 NC forged eyebolts. 7-Bolts (six).

8-Planetary transmission. Remove from transmission case and position vertically on blocks.

Transmission Disassembly

This is a cross section of the planetary transmission. The shaded areas, in order of removal, are: A-No. 1 clutch, clutch housing and planet carrier. B-No. 2 clutch, clutch housing, ring gear and No. 1 ring gear. C-No. 3 clutch, clutch housing and ring gear, No. 1 and No. 2 sun gear, No. 2, No. 3 and No. 4 planet carrier. D-No. 4 clutch, clutch housing and ring gear. E-No. 5 clutch and ring gear. F-No. 5 clutch housing, No. 3, No. 4 and No. 5 sun gears, output shaft.

A - No. 1 Clutch, Clutch Housing and Planet Carrier 1. Remove only the three bolts located by the "S" mark. When installing tighten to a torque of 85 ± 5 lb. ft. (11,8 ± 0,7 mkg).

2-No. 1 clutch housing. Invert, remove the two 3/8" bolts and disassemble as shown. The exploded view is shown inverted.

B - No. 2 Clutch, Clutch Housing, Ring Gear and No. 1 Ring Gear

1-Pins (two). Drive flush with face of carrier to allow retaining ring removal.

C-No. 3 Clutch, Clutch Housing and Ring Gear, No. 1 and No. 2 Sun Gear, No. 2, No. 3 and No. 4 Planet Carrier

1-Remove bolt and retainer from inside of sun gear. Then remove sun gear and install 3/8" - 16 NC forged eyebolt as shown. 2-Clutch release springs (ten). 3-Clutch reaction pins (five).

D-No. 4 Clutch, Clutch Housing and Ring Gear

1-Pins (two). Drive flush with face of carrier to allow retaining ring removal.

E-No. 5 Clutch and Ring Gear

F-No. 5 Clutch Housing, No. 3, No. 4 and No. 5 Sun Gears and Output Shaft

1-Retaining ring. Must be removed first to allow output shaft to be lowered for removal of retaining ring at other end of shaft.

Torque Converter Removal And Installation

1. Place transmission and torque converter unit on a suitable stand as shown.

2-Bolts (two). Replace two diametrically opposite bolts with 3/8" - 16 NC forged eyebolts. 3-Bolts (fourteen).

4-Torque converter oil supply tube.

5-Guide pins (two). With torque converter in position shown, remove two retaining bolts and replace with 1/2" - 13 NC guide pins. 6-Bolts (five). 7-Retainer. 8-Output shaft.