The John Deere Tractor Repair Manual by I&T/Clymer covers series 2150, 2155, 2255, 2350, 2355, 2355N, 2550 and 2555. The tractor repair manual is written by professionals and is geared towards the DIY novice and professional mechanic. The manual includes tips and tricks for troubleshooting, maintaining and repairing your rig. Instructions and descriptions are enhanced with photographs, illustrations and even detailed diagrams to make locating components, removing them and repairing them easier than ever. Regardless of your skill level, every mechanic will learn something new from this manual.
I&T/Clymer manuals have been the most trusted source for tractor repair professionals for over 40 years. The detailed descriptions, easy-to-read layout and helpful pictures make these tractor manuals a must-have in any shop that deals with farm equipment. Although this manual covers a wide range of topics from brakes to transmissions, it does not include wiring diagrams. All I&T/Clymer manuals include free shipping to the contiguous 48 states.
Book Excerpt: John Deere Tractor Repair Manual Series 2150, 2155, 2255, 2350, 2355, 2355N, 2550, 2555
SAFETY VALVE BLOCK
A safety shock valve is used on all models to act as a relief valve should a front wheel strike a solid object. Piston in steering cylinder is forced to one side and oil pressure increases greatly in hydraulic steering lines. The suction valve on pressure loaded side of safety valve closes immediately. The safety shock valves and suction valves may be located in steering valve housing as shown at (33 to 39 - Fig. 38), or in a separate safety valve block (40 or 41 - Fig. 39).
PISTONS, RINGS AND SLEEVES
The specific type used will depend upon model, serial number range and equipment installed on the specific tractor. On all models, the safety valve opens at 20,5000 kPa (2980 psi), allowing oil to flow to the low pressure side of steering cylinder. The check valve (2-Fig. 40) prevents oils from returning to hydraulic pump when pump is not operating.
Pistons are cam ground, forged aluminum alloy and are fitted with three rings located above the piston pin. Pistons are available in standard size only, but pistons with different ring height and different head height are used for different applications. Be sure correct type is installed for engine and application.
Pistons are stamped "FRONT," marked by an arrow on the piston head or stamped "B" or "H" on underside of piston pin boss. Do not stamp head of unmarked pistons for identification before checking underside of piston boss, because upper ring groove may be damaged. If necessary to mark piston, use a method that does not result in damage to piston.
Subject: John Deere farm tractor service, maintenance, repair. ISBN-10: 0872884716 | ISBN-13: 9780872884717 | I&T JD58