Upright NX15 Service & Parts Manual

Page 3-20
Maintenance 3.16 - Depression Mechanism Cylinder
MX15/19
3.16 D
EPRESSION
M
ECHANISM
C
YLINDER
R
EMOVAL
Figure 3-23:
Depression Mechanism Cylinder
1. Open the module door to access the cylinder.
2. Tag and disconnect the hose assemblies from the
cylinder fittings and immediately cap the openings
to prevent foreign material from entering.
3. Remove the cotter pins from the pivot pins.
4. While supporting the cylinder, remove pivot pins.
Remove the cylinder.
D
ISASSEMBLY
1. Unscrew the head cap from the barrel, removing
the head cap, piston, and shaft assembly from the
barrel tube.
2. Unscrew the piston.
3. Remove all rod wipers, U-cups, O-rings, and
backup rings from the headcap, and discard.
4. Remove the piston ring and O-ring from the piston,
and discard.
C
LEANING AND
I
NSPECTION
1. Wash all the metal parts in cleaning solvent and blow dry with filtered compressed air.
2. Inspect all the threaded components for stripped or damaged threads.
3. Check the inside surface of the cylinder barrel for scoring or excessive wear.
4. Check the piston and headcaps for scoring or excessive wear.
5. Inspect the surface of the shaft for scoring or excessive wear.
A
SSEMBLY
1. Lubricate and install new rod wiper, U-cup, O-ring, and backup ring on the headcaps.
2. Install the headcap onto the shaft.
3. Install the new piston rings and O-ring on the piston. Re-install the piston.
4. Lubricate the piston seal with clean hydraulic fluid and install the shaft assembly in the cylin-
der barrel.
5. Install the head cap into the cylinder barrel, and tighten the head caps.
I
NSTALLATION
1. Position the cylinder assembly in the chassis. Insert the pivot pins and secure with new cot-
ter pins.
2. Connect the hose assemblies to the fittings.
3. Operate the steering circuit several times throughout its entire range of travel to expel
trapped air, then check for leaks.
060569-004

Upright NX15 Specifications

General

Brand	Upright
Model	NX15
Category	Lifting Systems
Language	English