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2124 Knuckleboom Loaders0 pages
2124 SPECIFICATIONS
2124 LIFT CAPACITY
Lift Capacity Chart PRENTICE 2124 • Boom Type: Knuckleboom • Boom length: 22’ (6.7m)
1.5m (5’/)
kg.
lbs.
kg.
3m (10’/)
lbs.
2507
Full Reach
5528
2092
5302
2358
5198
2430
6.1m (20’/)
4613
2405
7.6m (25’/)
5358
2500
1508
3324
2298
2314
3103
0 0.0
4070
7626
2610
5755
2062
4545
4230
9325
2886
6363
2082
4591
8900
2747
6056
2058
4538
4109
9058
2710
5974
1625
3582
8608
2569
5664
1972
4349
6544
1854
4087
2800
4898
1846
2968
2222
6030
3904
3974
2735
4037
1802
6842
3459
4.6m (15’/)
1.5m (5’/)
6.1m (20’/)
kg.
lbs.
2962
9.1m (30’/)
3m (10’/)
4.6m (15’/)
kg.
lbs.
6172
1741
3838
1528
3369
kg.
3m (10’/)
lbs.
9.1m (30’/)
2327
3329
Boom Structure
Construction
0 0.0
1995
3915
1478
3259
2041
4500
1699
3745
1859
4099
1661
3663
2107
4645
1910
4211
2178
4802
1891
4169
2345
4.6m (15’/)
Full Reach
4569
1776
6.1m (20’/)
1.5m (5’/)
6.1m (20’/)
kg.
lbs.
2072
7.6m (25’/)
3m (10’/)
4.6m (15’/)
kg.
lbs.
1803
3975
Cylinders
Diagnostic Nipples
Oil Filter
Oil Reservoir
Pump Mounting
Loader Pump
Swivel
Hoses & Hydraulic Tubes
Fittings
KNUCKLE BOOM
Boom Length
2242
Lift Capacity Chart PRENTICE 2124 • Boom Type: Knuckleboom • Boom length: 25’ (7.62m)
1.5m (5’/)
kg.
lbs.
HYDRAULIC SYSTEM
Type
Operation
Control Valves
5169
1974
4352
5789
12762
3611
7960
2748
6059
2134
4706
6680
14727
3662
8074
2614
5764
2021
5077
4233
9332
2831
6243
2068
4460
2647
5835
4021
8864
2683
5915
1908
6522
3715
8191
2445
5390
1459
3216
3400
7496
3509
7736
2303
5077
1361
1769
4207
2958
1634
4456
2303
1693
3001
1693
1642
STABILIZERS
Type
Structural
Stab Pads
Clearances
Stowed
STRUCTURAL
Pedestal
Swing System
Travel
Travel Height
Weight
Mounting
CYLINDERS
Main Boom
Stick Boom
Stabilizers
OPERATION OF LOADER
Operator’s Platform
Seat
Controls
2592
NOTES:
Capacities shown in “Black” are 100% of main cylinder hydraulic capability; capacities shown in “Red” are 87% of hydraulic
capacity.
Notice that some of the lifts in “Red” are higher than main only, since the stick has mechanical advantage and the limiting lift is the
main relief.
WEIGHT
Split flow tandem circuit hydraulic system. System pressure 3200 psi. (2,249,822.7 kg)
Fully independent simultaneous operation of main boom and swing. Flow diverted to operate stabilizers.
Stack sections with mechanical joysticks. Valves contain port reliefs and anti-cavitation valves for loader protection and control. Port relief
settings are 2,671,664.4 kg (3800 psi.)
114.3 cm (4.5”) Main and stick double acting with solid rods.
Located at control valves.
Two return spin on filters, 2 nominal/10 absolute micron filter. Twenty five micron case drain filter.
159 liters (Forty two [42] gallon) capacity. Filtered breather, sight gauge. Cylindrical design, aluminum fabrication.
Direct mounted PTO driven, bi-rotational, delivering 151liters (40 GPM). (Optional Chassis mount configuration.)
Tandem gear type (21 + 19) operating at 1650 rpm (max) through PTO. Pump rated for 2,460,743.5 kg (3500 psi.)
Steel barrel with Durabar core. Five passages for pressure, return and stabilizers. Eight ring electric collector standard for optional light
packages.
2,812,278.3 kg (4000 psi) rated hose with wear resistant coating. Steel ORS tubing.
ORS fittings.
2124 Knuckleboom Loaders
6.7 m (22’) horizontal reach. 10.3 m (34’) working height to boom tip. (Optional Tele-Boom): 10.3 m (25’) horizontal reach. 11.2 m (37’)
working height to boom tip.
Boom is high tensile steel fabrication. Main boom equivalent to 25.4 cm (10”) x 15.2 cm (6”) Spar tube. Stick boom equivalent to
20.3 cm (8”) x 15.2 cm (6”) spar tube.
Welded high tensile steel “Knuckle type” boom with heat treated high alloy steel pins and aluminum-bronze pivot bushings; self-aligning
bushings at both ends of main and stick boom cylinders. Boom & cylinder pin bushings are greased through pins. Castings at base end,
stick end and midpoint of mainboom assembly
Telescopic A-frame stabilizers with individual platform controls for uneven terrain.
Stabilizer legs are 17.8 cm (7”) x 17.8 cm (7”) high tensile steel tubing.
Stabilizer pads measure 25.4 cm (10”) x 38.1 cm (15”).
Ground clearance for stabilizers in retracted position is 50.8 cm (20”). Below grade reach in extended position is 40.6 cm (16”).
Stabilizers stowed position 251.4 cm (99”) wide. Width at grade level 284.4 cm (112”) on 101.6 cm (40”) truck. Width fully extended
284.4 cm (122”).
“A-Frame” pedestal design is formed high strength steel plate.
Continuous rotation; ring and pinion gear set driven by an axial piston hydraulic motor through a planetary gearbox. Slewing ring is
65.1 cm (25.65”) diameter. Swing torque 71,014.91 kg (14,545 ft.lbs.).
Swing system is secured by house lock during transit.
33.5 cm (13’ 2”) maximum stowed height above ground 101.6 cm (40”) truck frame height
2,585.4 kg (5,700 lbs) for the 6.7 m (22’) fixed boom model and 2744.23 kg (6,050 lbs) for the 7.62 m (25’) tele boom model.
“A-frame” mounting base is 90.8 cm (35 3/4”) wide x 66 cm (26”) long for mounting on standard truck chassis.
(1) 11.4 cm (4.5”) Bore x 6.3 cm (2 1/2”) Rod
(1) 11.4 cm (4.5”) Bore x 6.3 cm (2 1/2”) Rod
(2) 7.6 cm (3”) Bore x 5 cm (2”) Rod
Platform right side mounted with fold over seat. Access to platform by single ladder.
Fold down seat with armrests
Two mechanical joysticks and proportional teleboom controls. Swing pedal with mechanical linkage. Individual controls for activation
of stabilizer.
5700 lbs. with 22’ boom
Add 250 lbs for 25’ teleboom option
CAPACITY (Note: SAE Standard 87% Ratings)
Radius
1.5 m (5’)
3 m (10’)
4.5 m (15’)
6 m (20’)
6.7 m (22’)
Elevation
1.5 m (5’)
1.5 m (5’)
1.5 m (5’)
1.5 m (5’)
1.5 m (5’)
Lift Capacity
(5,050 lbs.)
2,290.6 kg
(8,523 lbs.)
3,865.9 kg
( 5,567 lbs.)
2,525.1 kg
(3,266 lbs.)
1,481.4 kg
(2,084 lbs.)
945.2 kg
Note: Deduct grapple weight for payload
www.prenticeforestry.com
Caterpillar Forest Products
100 S.L. White Blvd.
LaGrange, GA 30241
We reserve the right to change specifications and to improve our products without notice
or obligation. Photos may not represent standard machine configuration.
Form No. PRSL-0408 • Printed in U.S.A.
Built Better Than It Needs To Be
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