Complete workshop repair & service manual with electrical wiring diagrams for Bobcat 641, 642, 642B, 643 Loaders. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This Bobcat 641, 642, 642B, 643 Loader service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

6556850 (6-82) - 641 Operator's Manual.pdf
6556852 (6-82) - 642 Operation & Maintenance Manual.pdf
6556854 (6-82) - 643 Operator's Manual.pdf
6566135 (10-86) - 641, 642, 643 Service Manual.pdf
6566557 (4-83) - 643 Operator's Manual.pdf
6566561 (2-83) - 641 Operator's Manual.pdf
6566562 (2-83) - 642 Operator's Manual.pdf
6566706 (4-84) - 641 Operator's Manual.pdf
6566707 (3-84) - 642 Operator's Manual.pdf
6566708 (10-98) - 643 Operation & Maintenance Manual.pdf
06570241 (8-96) - 641, 642, 642B, 643 Operation & Maintenance Manual.pdf
6570246 (4-87) - 642B Operator's Manual.pdf
6570275 (4-86) - 642B Service Manual.pdf
6720910 (10-91) - 642B, 742B, 743B Hand Controls Operation & Maintenance Manual.pdf

EXCERPT:
PREVENTIVE MAINTENANCE
Paragraph Page
Number Number
AUXILIARY CONTROL LOCKBOLT . . . . . . . . 1–15 1–20
BOB–TACH . . . . . . . 1–13 1–19
DRIVE BELTS . . . . . . 1–6 1–12
ELECTRICAL SYSTEM . . . . . . . . . 1–7 1–13
ENGINE COOLING SYSTEMS . . . . . . . . . . . . . 1–5 1–10
ENGINE SERVICE . . . . . . . . . . . . . 1–3 1–4
FINAL DRIVE . . . . . . . 1–9 1–17
FUEL SYSTEM . . . . . 1–4 1–8
HYDRAULIC/HYDROSTATIC SYSTEM . . . . . . 1–8 1–15
INTRODUCTION . . . . 1–1 1–1
LIFT ARM STOP . . . . . . . . . . . . . . 1–16 1–20
LUBRICATION OF THE BOBCAT LOADER . . . . . . . . . . . . 1–11 1–18
OPERATOR GUARD . . . . . . . . . . 1–12 1–19
PIVOT PINS . . . . . . . 1–14 1–20
SERVICE SCHEDULE . . . . . . . . . . 1–2 1–3
TIRE MAINTENANCE . . . . . . . . . 1–10 1–17
…
To install new brake/puck assembly (Fig. 4–10):
13. Remove the brake block (Item 1) from the transmission cover (Item 2).
14. Remove the brake pucks (Item 3) and check them for wear and damage.
Replace the pucks and wear plates as needed. Check the cam pin for damage.
15. Install the wear plates (Item 4) and pucks into the brake block.
16. Put a new O–ring (Item 5) onto the cam pin and install the cam pin into the brake block.
17. Put a bead of silicone rubber sealant on the side of the brake block that the transmission cover fastens to.
18. Apply LOCTITE to the bolts used to fasten the transmission cover to the brake block.
19. Install the bolts and tighten the bolts 65–70 ft.–lbs. (88–95 Nm) torque.
20. Put the brake assembly and transmission cover over the brake discs (Fig. 4–11).
21. Align the brake discs so they are centered between the brake pucks.
22. Align the holes. Install the bolts and tighten 16–20 ft.–lbs. (22–27 Nm) torque.
23. Install the brake linkage (See Steps 4–11 under Brake Assembly).
NOTE: Remove the spacer from under the hydrostatic pump. Install the bolts into the rubber bushings while holding the pump up to prevent bushings from being pushed out.
4–2 FINAL DRIVE
The final drive does not have connector links, but if the chain is separated during maintenance use a press link for assembly.
4–2.1 Chain Replacement
The tools listed will be needed to do the following procedure:
MEL1045 Chain Breaker
MEL1037 Chain Link Tool Set
…