JLG 260MRT - Installation

SECTION 2 - PROCEDURES
3121801 2-15
Assembly
NOTE: Prior to cylinder assembly, ensure that the proper cylinder
seal kit is used.
Apply a light film of hydraulic oil to all components prior to
assembly.
1. Using suitable protection, clamp the cylinder rod in a
vise or similar holding fixture.
2. Place a new o-ring into the cylinder rod piston groove.
3. Place a new T-seal on the piston, then carefully install
the piston the cylinder rod, ensuring that the o-ring in
the rod groove is not damaged or dislodged. Secure the
piston in place with two new retaining rings.
4. Carefully slide the spacers onto the cylinder rod.
5. Place a new wiper, rod seal, o-ring and wear ring on each
of the two cylinder heads. Set the heads aside for later
installation on the cylinder rod.
6. Remove the cylinder rod assembly from the holding fix-
ture.
7. Position the cylinder barrel in a suitable holding fixture.
EXTREME CARE SHOULD BE TAKEN WHEN INSTALLING THE CYLINDER ROD,
PISTON AND HEADS. AVOID PULLING THE ROD OFF-CENTER, WHICH COULD
CAUSE DAMAGE TO THE PISTON AND CYLINDER BARREL SURFACES.
8. With the barrel clamped securely, and while adequately
supporting the cylinder rod assembly, insert the cylin-
der rod assembly into the cylinder barrel. Ensure that
the piston T-seal and o-ring are not damaged or dis-
lodged.
9. Continue pushing the rod assembly into the cylinder
barrel until the cylinder rod is approximately centered in
the barrel.
10. Carefully install one of the cylinder heads on one end of
the cylinder rod and push the head onto the rod until it
is snug against the end of the cylinder barrel.
11. Install one of the cylinder head retainers on the end of
the cylinder barrel and tighten with a suitable chain
wrench.
12. Carefully install the remaining cylinder head on the
opposite end of the cylinder rod and push the head
onto the rod until it is snug against the end of the cylin-
der barrel.
13. Install the remaining cylinder head retainer on the end
of the cylinder barrel and tighten with a suitable chain
wrench.
Installation
1. Carefully install the steer cylinder assembly into the
front axle. Align the cylinder mounting block on the bar-
rel with the mounting slot in the bottom of the axle and
lower the steer cylinder until the mounting block rests in
the slot.
2. Turn the steer wheels to line up the mounting holes in
the steer spindles and the steer cylinder ends. Secure
each end of the steer cylinder with a bolt and lock nut.
3. Reconnect the hydraulic hoses to the applicable cylin-
der ports.