Clark GEX20 - Upright Specifications and Description

Group 34, Uprights
SM 765, Nov ’06 Upright Specifications and Description • 34-1-1
General Specifications
Upright Weight: (Approximately 359 kg (792 lb) to
approximately 993 kg (2190 lb) without carriage.
Carriage Weight: Approximately 89 kg (196 lb) to 99 kg
(220 lb) with a 41 inch carriage.
Fork Weight: Approximately 44 to 99 kg each (97 to 220
lbs).
IMP
O
RTANT
Before hoisting, the weights of upright, car-
riage, forks and attachments being lifted
must be combined to determine what lifting
capacity is required of the hoisting equip-
ment.
Capacities and Lift Heights: Upright, carriage, and fork
capacity and upright lift heights are listed on the truck’s
data plate.
Lubricants:
• All Purpose Grease (MS-9)
• Innerslide Lubricant (Clark P/N 886396)
• Chain and Cable Lube (Clark P/N 886399)
Cylinder Types
Standard uprights use two lift cylinders. Triple stage and
Hi-Lo uprights use three cylinders, a primary (center-
mounted) cylinder, and two secondary cylinders. All pri-
mary cylinders used on triple-stage uprights (TSUs & Hi-
Lo) are piston cylinders. The lift and secondary cylinders
used on standard, Hi-Lo uprights and TSUs can be piston
cylinders.
The types of cylinders used on the truck are listed below.
Check the first five characters of the upright number
stamped on the upright of the truck to determine the type
of cylinder, piston used on the upright.
IMP
O
RTANT
Before removing any component for over-
haul, make sure the correct repair parts,
seals, and gasket sets are available.
Drift:
With the upright substantially vertical the descent of the
rated load caused by an internal leakage in the hydraulic
system shall not exceed 100mm (4in) during the first
10min with the oil in the hydraulic system at normal oper-
ating temperature. If drift over 100 mm (4 in) in ten min-
utes is evident, cylinder should be checked for internal
leakage. See Section 3 for drift test procedures.
Fastener and Fitting Torque Specifications
Pin Mounting Bolts: 280~320 N⋅m (205~234 ft-lb)
Load Back Rest: 215-264 N⋅m (159-195 ft-lb)
Chain Anchor Bolt Jam Nut: 100-200 N⋅m (74-148 ft-lb)
Carriage Side-Thrust Roller Bolts(External): 40-50 N⋅m
(29.5-37 ft-lb)
Carriage Side-Thrust Roller Bolts(Internal): 70-80 N⋅m
(52-59 ft-lb)
Hose Fittings: See Group 40, “Hydraulic Fitting Tighten-
ing Procedure.”
Rod End Bolts: 170-190 N⋅m (125-140 ft-lb)
Tilt Cylinder Rod-End Pin Lock Plate: 40-45 N⋅m (30-33
ft-lb).
Service Intervals
• All upright components should be visually checked
every day during the Operator’s Daily Inspection.
• A thorough visual inspection should be performed
by a trained service professional every 50-250
hours.
• Lift chains should be inspected and lubricated
every 50-250 hours or monthly.
Upright
Upright Type
Number Cylinder Type
<GEX20-30>
STD Pneu V2324 Piston-Type Lift Cylinder
TSU Pneu M2324 Piston-Type Secondary Cylin-
der
Hi-Lo Pneu H2317 Ram-Type Secondary
Cylinder
Section 1
Upright Specifications and Description