Section 7. Component Procedures Model 8210/8250 Maintenance Manual
Hydraulic Cylinder Hydraulic Components
7-104 Publication: 1146945/001, Revised: 25 Sep 2018
Hydraulic Cylinder
Slight fluid leakage indicates that the seal is
becoming worn. Replace the seal, wiper, and
retaining ring (Seal Kit P/N 939-028) when fluid
leakage becomes excessive.
Cylinder Removal
1. Remove the tractor covers. See “Tractor
Cover Removal” on page 7-8.
2. Remove the main harness bracket. See
“Main Harness Bracket Removal” on
page 7-70.
3. Place the Main ON/OFF Switch in the ON
position. If equipped with the optional
keypad, enter your PIN-key code and then
press the green ON ( | ) key. Leave the
control handle in the neutral (vertical)
position.
4. Press the lift button, raise the forks to
maximum height and block them.
Use extreme care whenever the truck is
jacked up. Keep hands and feet clear
from the vehicle while jacking the truck.
After the truck is jacked, put solid blocks
beneath it to hold it. Do not rely on the
jack alone to hold the truck. For details,
see “Jacking Safety” on page 2-10.
5. Lower the forks on the blocking to release
the pressure on the hydraulic cylinder.
6. If equipped with the optional keypad,
press the red OFF ( O ) key. Place the Main
ON/OFF Switch in the OFF position.
Disconnect the battery connector from the
truck.
Hot oil under pressure is present. Make
sure the truck is safely blocked and the
pressure is released.
7. Thoroughly clean the outside of the
cylinder before removing the hydraulic
hose. Remove the hose from the cylinder.
Cap and plug the fittings.
N
OTE: Catch the hydraulic fluid under the
hydraulic cylinder in a suitable
container.
8. Remove the bolts and retaining bracket
attached to the pivot frame at the base of
the cylinder. See Figure 7-113.
Figure 7-113.
9. Remove the cotter pin [3] and retaining pin
[2] securing the top of the cylinder [1] to
the tractor frame. See Figure 7-114.
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