New Holland GT18, GT20, GT22 Garden Tractor Service Repair Manual (86620471)

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New Holland GT18, GT20, GT22 Garden Tractor Service Repair Manual (86620471)

Format: PDF
Language: English
Number of Pages: 740 pages
Brand: New Holland
Type of document: Repair Manual
Model: Tractor GT18, GT20, GT22
Part No: 86620471
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New Holland GT18, GT20, GT22 Garden Tractor Service Repair Manual (86620471)

External Engine Inspection Before cleaning or disassembling the engine, make a thorough inspection of its external appearance and condition. This inspection can give clues to what might be found inside the engine (and the cause) when it is disassembled. Check for buildup of dirt and debris on the crankcase, cooling fins, grass screen and other external surfaces. Dirt or debris on these areas are causes of overheating.
Check for obvious fuel and oil leaks, and damaged components. Excessive oil leakage can indicate a clogged or improperly assembled breather, worn or damaged seals and gaskets, or loose or improperly torqued fasteners. Check the air cleaner cover and base for damage or indications of improper fit and seal.
Check the air cleaner element. Look for holes, tears, cracked or damaged sealing surfaces, or other damage that could allow unfiltered air into the engine. Also note if the element is dirty or clogged. These could indicate that the engine has been underserviced. Check the carburetor throat for dirt. Dirt in the throat is further indication that the air cleaner is not functioning properly. Check the oil level.
Note if the oil level is within the operating range on the dipstick, or if it is low or overfilled. Check the condition of the oil. Drain the oil into a container the oil should flow freely. Check for metal chips and other foreign particles. Sludge is a natural by product of combustion; a small accumulation is normal. Excessive sludge formation could indicate overrich carburetion, weak ignition, overextended oil change interval or wrong weight or type of oil was used, to name a few.
NOTE: It is good practice to drain oil at a location away from the workbench. Be sure to allow ample time for complete drainage. Cleaning the Engine After inspecting the external condition of the engine, clean the engine thoroughly before disassembling it. Also clean individual components as the engine is disassembled. Only clean parts can be accurately inspected and gauged for wear or damage.
There are many commercially available cleaners that will quickly remove grease, oil, and grime from engine parts. When such a cleaner is used, follow the manufacturers instructions and safety precautions carefully. Make sure all traces of the cleaner are removed before the engine is reassembled and placed into operation.
Even small amounts of these cleaners can quickly break down the lubricating properties of engine oil.

New Holland GT18, GT20, GT22 Garden Tractor Service Repair Manual (86620471)

Engine Systems………….. 5
ELECTRICAL……………….321
PTO SYSTEM……………….457
HYDROSTATIC TRANSMISSIONS….471
HYDRAULICS……………….549
STEERING AND FRONT AXLE……577
LIFT LINKAGE……………..641
SPECIFICATIONS……………659
MOWER DECKS………………675