Manitowoc Grove CD3340B Service Manual page 287

CD3340B/YB4411
REAR STEERING CYLINDER
Technical Data
Cylinder Bore...................................57 mm (2.25 in)
Stroke..............................................187 mm (7.38 in)
Rod Diameter....................................38 mm (1.50 in)
Special Torques
Piston Lock Nut......................................136 Nm (100 lb-ft)
Special Tools
a0668
Cylinder Repair
Removal
WARNING
Crushing Hazard!
A raised and badly supported machine can fall on you
causing severe injury or death. Position the machine on a
firm, level surface before raising one end. Ensure that the
other end is securely chocked. Do not rely solely on the
machine hydraulics or outriggers to support the machine
when working under it.
Disconnect the battery cables while you are under the
machine, to prevent the engine from being started.
GROVE
1. Raise and support the machine to gain access to the
steering cylinders.
2. With the engine not running, turn the steering wheel in
both directions to release any pressure in the hydraulic
lines to the steering cylinders.
3. Place a tag on the hoses for identification and correct
assembly. Be prepared to collect the hydraulic oil as you
remove steering lines. Slowly loosen the hydraulic
hoses to release any remaining pressure. Install plugs in
the hose ends and a caps in the cylinder ports.
4. Make a reference mark to note the position of the
clamps on the adjustable ends. The clamps must be
installed in the same position at assembly.
5. Remove the cotter pins, slotted nuts and washers from
the cylinder ends. Remove the cylinder and take it to a
clean work area for disassembly.
Disassembly
1. Remove the caps from the cylinder ports and drain
remaining oil from the cylinder.
2. Fasten the cylinder base in a vice; apply force only
across clamp on the adjustable end. To prevent
distortion or damage, do not apply force directly to
cylinder tube. Use a chain wrench around the solid end
of cylinder tube if necessary to prevent rotation of
FIGURE 10-22
cylinder tube during removal of head.
3. Use a spanner wrench like the one shown in
Figure 10-22 and loosen the cylinder head (8,
Figure 10-23).
4. Pull the piston and rod (3 and 13) straight out of cylinder
tube (1). If the cylinder rod and piston are hard to
remove, install the cylinder head back into the cylinder
tube and apply shop air to the base port to push the
piston out to cylinder head.
If air or hydraulic pressure is used to force out the piston
assembly, ensure that the piston head is securely
installed in the cylinder tube.
5. Fasten the adjustable end of the rod in a vise. Do not
clamp to the chrome part of the rod.
Published 04/07/2015 Control # 569-00
STEERING SYSTEM
WARNING
Flying Objects Hazard!
10
10-17