Toro Multi Pro 1750 Service Manual page 101

Disassembling a Boom Lift Cylinder (Fig. 39)
1. Remove oil from the boom lift cylinder into a drain
pan by slowly pumping the cylinder shaft. Plug both
ports and clean the outside of the cylinder.
IMPORTANT: Prevent damage when clamping the
hydraulic cylinder into a vise. Do not close vise
enough to distort the barrel.
2. Mount barrel end of lift cylinder in a vise.
3. Remove internal collar (item 4) with a spanner
wrench.
4. Remove plugs from ports. Extract shaft, head and
piston by carefully twisting and pulling on the shaft.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Protect shaft surface before mount-
ing in a vise.
5. Mount shaft securely in a vise by clamping on the end
of the shaft. Remove lock nut and piston from the shaft.
Slide head off the shaft.
6. Remove seal kit components from the piston and
head. Discard removed seals, back−up ring and O−
rings.
Multi Pro 1750
Assembling a Boom Lift Cylinder (Fig. 39)
1. Make sure all cylinder parts are clean before as-
sembly.
2. Coat all seat kit components with clean Dexron III
ATF.
A. Install seal and O−ring to the piston.
B. Install O−ring, back−up ring, shaft seal and dust
seal to the head.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Protect shaft surface before mount-
ing in a vise.
3. Mount shaft securely in a vise by clamping on the end
of the shaft.
A. Coat shaft with a light coating of clean Dexron III
ATF.
B. Slide head assembly onto the shaft. Install piston
and lock nut onto the shaft. Torque lock nut 160 ft−lb
(217 N−m) to secure assembly.
C. Remove shaft from the vise.
IMPORTANT: Prevent damage when clamping the
hydraulic cylinder into a vise. Do not close vise
enough to distort the barrel.
4. Mount end of the barrel in a vise.
5. Coat all internal parts with a light coating of clean
Dexron III ATF. Slide piston, shaft and head assembly
into the barrel being careful to not damage the seals.
6. Install internal collar (item 4) with a spanner wrench
to secure head into the barrel.
Page 4 − 53 Hydraulic System