CIPI UNDERCARRIAGE Arrangements: 9Q5221, 9Q5234, 9Q5243, 9Q5245, 9Q5246, 9Q5247, 9Q5385, 9Q5433, 9Q5482, 9Q5622, 9Q5661, 9Q5719, 9Q5720, 9Q5721, 9Q5722, 9Q5830, 9Q5840, 9Q5857, 9Q5874, 9Q5883, 9Q5930 and 9Q5940 Caterpillar

Illustration 1	g00579856

Output torque ... 62,133 N·m (45,830 lb ft)

Input speed ... 2600 rpm

Input torque ... 877 N·m (647 lb ft)

Ratio ... 74.13:1

Static brake torque ... 452 N·m (333 lb ft)

Brake release pressure ... 760 kPa (110 psi)

Maximum brake release pressure ... 34,300 kPa (5000 psi)

Approximate weight ... 425 kg (940 lb)

Drive motor type ... Dual displacement, slipper style piston

Track motor displacement per revolution

Low speed ... 172 cc (10.49 in³)

High speed ... 103 cc (6.28 in³)

Speeds ... 2

(1) Apply 9S-3263 Thread Lock on the threads of 12 bolts.

(2) Apply 9S-3263 Thread Lock on the threads of 20 bolts.

Torque for 20 bolts ... 900 ± 100 N·m (660 ± 75 lb ft)

(3) Apply 1U-8846 Gasket Maker to the surfaces of ring gear (3).

(4) After you install the seven pins, make stake marks near the opening of each pin hole. An example is shown in View A.

(5) Apply 9S-3263 Thread Lock on the threads of ten bolts.

Torque for ten bolts ... 900 ± 100 N·m (660 ± 75 lb ft)

(6) At assembly, O-rings of the floating seals and all surfaces in contact with the O-rings must be clean and dry. Apply a thin coat of oil on the contacting surfaces of the metal seals before installation.

(7) Use the plates to achieve the correct clearance "D". Clearance "D" equals 1.0 mm (0.04 inch) to 2.0 mm (0.08 inch).

94-0577 Plate ... 7.0 mm (.28 inch)

94-0578 Plate ... 8.0 mm (.31 inch)

94-0579 Plate ... 9.0 mm (.35 inch)

94-0580 Plate ... 10.0 mm (.39 inch)

Grease may be used in the counterbore to retain the spacer at assembly.

(8) Torque for two plugs ... 135 ± 15 N·m (100 ± 11 lb ft)

(9) Apply 5P-3931 Anti-Seize Compound to the surfaces in contact with the pins.

Use the following procedure to adjust the preload of bearing (12) :

1. Place a load "P" of 4000 kg (8820 lb) on bearing (12) .

2. Rotate the housing (13) in order to seat the bearing.

3. Reduce load (P) to 1000 ± 100 kg (2200 ± 220 lb).

4. Measure dimension (B) .

5. Measure dimension (C) of gear (10) .

6. Use a maximum of two shims (11) to achieve the correct clearance.

Note: If two shims (11) are used, place the thinnest shim next to gear (10) .

(11) Thickness of shim

7Y-1050 Shim ... 0.15 mm (.006 inch)

7Y-1051 Shim ... 0.3 mm (.012 inch)

7Y-1052 Shim ... 0.4 mm (.016 inch)

7Y-1053 Shim ... 0.5 mm (.020 inch)

7Y-1054 Shim ... 0.6 mm (.024 inch)

7Y-1055 Shim ... 0.7 mm (.028 inch)

7Y-1056 Shim ... 0.8 mm (.031 inch)

7Y-1057 Shim ... 1.0 mm (.039 inch)

7Y-1058 Shim ... 1.6 mm (.060 inch)

After assembly, apply 98 kPa (14 psi) of air pressure through the fill plug opening and sustain the air pressure for a minimum of 30 seconds. There should not be any pressure drop for a minimum of 30 seconds.