Complete workshop & service manual with electrical wiring diagrams for Bobcat 653 Loader. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This Bobcat 653 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.

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6900444 (8-97) - 653 Operation & Maintenance Manual.pdf

EXCERPT:
7A–5.7 Assembling The Vaporizer
1. Put a new diaphragm (Item 9) over the piston (Item 20) and put the retainer (flange up) on the diaphragm. Hold the parts with the screw but do not tighten at this time.
2. Check the condition of the inlet orifice (Item 13). If it is, damaged at the orifice shoulder, install a new orifice.
3. Install the inlet orifice block into its bore temporarily. This part has a slot and fits on a dowel pin in the bore to prevent the part from being installed wrong.
4. Put the assembled diaphragm and piston into the bore (Fig. 7A–22) so that the piston fits over the inlet orifice block without contacting it.
5. Make alignment of the six screw holes of the diaphragm with the holes in the vaporizer head and tighten the diaphragm (Fig. 7A–22). Hold the diaphragm and retainer to keep them from moving when tightening the screw.
6. Remove the assembled diaphragm and piston and the inlet orifice block from their bores after correct alignment has been made.
7. Check the inlet valve seat. If the disc is damaged or badly worn, make replacement of the complete unit.
8. Put the button on the spring and install the button end of the spring into the inlet valve seat. Install these parts into the bore (Fig. 7A–23).
9. Install the assembled diaphragm and piston into the bore after making replacement of the O–ring on the piston. Put light oil on the seal for easier installation. Check the piston alignment by looking into the inlet orifice bore.
The yoke of the piston should be in line with the inlet orifice bore, and the six diaphragm holes should be in alignment with the holes in the top of the vaporizer.
10. Put the cover over the diaphragm and fasten it with the six cover screws. Put the adjustment screw spring (Fig. 7A–21, Item 4) into the bore through the top of the cover and install the adjustment screw and lock nut (Items 2 & 3).
11. Turn the adjustment screw all the way in to press in the inlet seat.
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