This comprehensive service manual provides detailed information and specifications for the Caterpillar 72H Pipelayer, specifically designed for models equipped with D6T (T4i) tractor modifications. It covers a wide range of components, ensuring you have the necessary resources for maintaining and repairing your machine.

The manual includes detailed breakdowns of the hydraulic system and controls, encompassing the Load Sense system components like the manifold, flow valves, and filters. It also provides specifications for hydraulic cylinders, the hydraulic tank cover specific to the D6T (T4i), boom stop, diverter valve, and control panel and box. Further information on the mode control valve, pilot control valves (both 2-way and 3-way), a shuttle valve with 2 speeds, horn jumper wire, dozer handle plug, electrical connector plug, rear control panel installation (specific to the D6T (T4i)), hydraulic return to tank (D6T (T4i)), accumulator installation, counterweight control system parts (for both the D6T (T4i) and 72H), hydraulic hose chart (D6T (T4i)), and hydraulic hose modifications (D6T (T4i)) are all included.

The manual further delves into the structural and frame components, offering information on the crossmember (shared between the D6T (T4i) and 72H), left-hand frame component (compatible with D6R III and D6T tractors), and right-hand frame components (compatible with D6R SIII and D6T tractors).

Detailed information on the counterweight components is also included, encompassing the 72H Pipelayer specific counterweight, counterweight link assembly, counterweight yoke pin, and greased pins.

The service manual also covers other vital components such as mirrors, the overhead mirror bracket (D6T (T4i)), boom foot pin, guarding installation (for both the D6T (T4i) and 72H), seat riser mounting assemblies, rigging equipment and load block, sheaves, decals (for both the D6T (T4i) and 72H), the 20-foot boom (specific to the 72H Pipelayer), and heater options (D6T (T4i) and 72H), including the "no heater" option. This manual serves as an indispensable resource for technicians, operators, and anyone involved in maintaining and repairing the Caterpillar 72H Pipelayer with D6T (T4i) modifications.