MAINTENANCE MANUAL TEXAS HYDRAULICS Toto Hydraulic Cylinder 99-3051 Service Information Contents General General Information ‘Tear down Non-specific Tear down Procedures {inspection Inspection Procedures for Rod, Head, Piston, and Tube Rebuild Non-specific Rebuild Procedures Test Procedures for Testing Rebuilt Cylinder Warn "ng Hydraulic cylinders are designed to hold hydraulic fluid under high pressure.
MAINTENANCE MANUAL TEXAS HYDRAULICS INSPECT HEAD: Visually inspect the inside bore for scratches or polishing. Deep scratches are unacceptable. Polishing indicates uneven loading and when this occurs, the bore should be checked for out-of-roundness. If out-of-roundness exceeds 0.007", this is unacceptable. Check the condition of the dynamic seals looking particularly for metallic particles embedded in the seal surface. It is normal to cut the static seal on the retaining ring groove upon disassembly.
MAINTENANCE MANUAL TEXAS HYDRAULICS Z Head General The Z series head uses ductile from material and has 2 u-cup as the primary sealing element. Cylinders rated for high pressures or cylinders which experience pressure spikes, may have a back up ring behind the u-cup. The wisteria standard type D. The head is retained within the tube by means of its own buttress threads. There is a sealing o-ring that prevents contaminant from reaching the threads and provides an anti-rotation function.
TEXAS MAINTENANCE MANUAL HYDRAULICS Z Piston General The Z series piston uses ductile iron material and wearings (bearing rings). The seal groove is sized for a specially designed “zero drift” piston seal. The Teflon sealing ring has a small groove on its outside diameter that houses a quad ring seal. The entire ring is energized by a square section rubber loader. A small static o-ring seal is fitted to & groove in the piston and is held in place by the shoulder of the rod.
MAINTENANCE MANUAL TEXAS HYDRAULICS Z Piston (Threaded) General The Z series piston uses ductile iron material, wearings (bearing rings), and a specially designed piston seal as the primary sealing element. The Teflon sealing ring has a small groove on its outside diameter that houses a quad ring seal. The entire ring is energized by a square section rubber loader. A small static o-ring seal is fitted to a groove in the piston and is held in place by the shoulder of the rod.
TEXAS s MAINTENANCE MANUAL HYDRAULICS Valve Installation Toto cylinder 99-3051 (THI PN $24008020CCBZ) is unique in that it has “flow through” or “rephrase” functionality when fully retracted. The valve should be placed into the LD. cavity of the thread-on “2Z” piston. Lubricate the valve orig prior to inserting the valve. The side with the valve orig nearest the end should be firmly inserted into the piston cavity until it is seated against the back of the piston.
