D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Caterpillar


Clutch And Transmission Brake Valve Linkage
Direct Drive (6T8271 (Earlier); 8E0448 (Later))

Usage:



NOTE: Earlier and later valve groups may be identified by checking switch (7). On earlier valve groups, switch (7) has two leads. On later valve groups, switch (7) has four leads.

(1) Torque for 11 bolts ... 32 ± 4 N·m (24 ± 3 lb ft)

(7) Torque for switch (earlier) ... 40.7 N·m maximum (30 lb ft maximum)

Adjustment Procedure For Valve Linkage (Earlier)

NOTE: Adjustments must be made with the valve removed from the tractor.

1. Move piston (4) toward brake engaged position (piston moving out of valve body) until free movement stops. With piston (4) in this position, adjust link (8) until lever (6) closes switch (7) and allows current to flow.

2. Now move piston (4) toward clutch engaged position (piston moving into valve body) until free movement stops. With piston (4) in this position, and plunger (3) in its free position, adjust link (5) until roller (2) is at dimension (A) of 0.08 ± 0.08 mm (.003 ± .003 in) from link (5).

3. Make sure lever (6) is not in contact with switch (7) after piston (4) and plunger (3) are adjusted as described in Step 2.

Adjustment Procedure For Valve Linkage (Later)

NOTE: Adjustments must be made with the valve removed from the tractor.

1. Move piston (4) toward brake engaged position (piston moving out of valve body) until free movement stops. With piston (4) in this position, adjust link (8) until lever (6) closes switch (7) and allows current to flow.

2. Now move piston (4) toward clutch engaged position (piston moving into valve body) until free movement stops. With piston (4) in this position, and plunger (3) in its free position (no external force applied), adjust link (5) until roller (2) is at dimension (A) of 0.08 ± 0.08 mm (.003 ± .003 in) from the front face of link (5).

3. With piston (4) remaining toward the clutch engaged position, and plunger (3) in its free position, readjust link (8) until roller (2) is 1.50 ± 0.13 mm (.059 ± .005 in) from the front face of link (5).

4. Move piston (4) to the full clutch engaged position (piston moved into the valve body until bottomed). This compresses springs and will require that a lever be attached to the external shaft on the valve to gain the necessary leverage.

5. With piston (4) in the full clutch engaged position, there must be a minimum clearance of 0.08 mm (.003 in) between roller (2) and the rear face of link (5).

Caterpillar Information System:

D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Clutch And Transmission Brake Valve<BR> Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission Filter Group<BR> Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission And Clutch Pump Group<BR> Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Drive Shaft<BR> Power Shift
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Bevel And Transfer Gear Group<BR> Power Shift
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Linkage For Transmission Controls And Parking Brake
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission Filter Group<BR> Power Shift
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Resonator Assembly<BR> Power Shift
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission Hydraulic Controls<BR> Power Shift (8P8984, 8P3046)
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Selector And Pressure Control Valve<BR> Power Shift (8P8986, 8P3044)
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Outlet Relief Valve For Torque Converter
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Clutch Control Linkage<BR> Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Clutch<BR> Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission Brake Group<BR> Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Forward-Reverse And Parking Brake Control Linkage<BR> Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Transmission Gear Group<BR> Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Gear Shift Group<BR> Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Drive Shaft And Coupling<BR> Direct Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Steering Clutch And Brake Control Valve
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Linkage For Steering Clutch And Brake And Foot Brake Controls
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Steering Clutch And Brake Group
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Final Drive
D4H, D4H SERIES II, AND D4H SERIES III TRACTORS POWER TRAIN Equalizer Bar
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