RHINO 2-7741 User manual

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Brush grapple can be installed on front end
loaders equipped with skid steer male quick at-
tach or ISO quick attach.
TRACTOR REQUIREMENTS
1. Sufcient size to maintain control. Go one
size less than wheel track.
2. Hydraulics for brush grapple operation
- Hoses from rear tractor remotes (OR)
- Third-function hose kit to mid-mounted
valve
- Loader must be equipped with skid steer
male quick attach device or ISO quick
attach device
THE FOLLOWING INTENDED USE
STATEMENTS ARE SUGGESTED TO HELP
PREVENT ACCIDENTS
1. Using front end loader without special
attachments for handling large, heavy
objects, such as large round or rectangular
bales, fertilizer bags, and liquid containers
is NOT RECOMMENDED.
2. Handling large, heavy objects can be
extremely dangerous due to:
• Danger of tractor falling over.
• Danger of upending tractor.
• Danger of object falling or sliding down
loader arms to operator.
3. If you must perform above operations,
protect yourself by:
• Using proper attachment.
• Never lift loader higher than necessary to
clear ground when moving.
• Ballast rear of tractor to have 25% of gross
weight on rear tires.
• Never lift large objects with equipment that
does not have an anti rollback device.
• Move slowly and carefully, avoiding rough
terrain.
4. By properly balancing tractor, equipping
tractor with falling object protective
structure (FOPS) and exercising caution
the loader with brush grapple can move
bush effectively and safely. Do not attempt
to use loader to handle bagged materials,
or liquid containers, since such use is NOT
RECOMMENDED.
5. Do not use brush grapple and loader
bucket cylinders to apply downward force
great enough to lift front tractor tires off
ground. This operation could damage
grapple and/or make tractor unstable.
HYDRAULIC PLUMBING BRUSH GRAPPLE
1. Remove brush grapple from skid.
2. Hose ends on brush grapple are male
#8 SAE o-ring (3/4-16 thread) . Attach
hydraulic female quick coupler (not
supplied with kit) to one hose of brush
grapple. Attach male quick coupler (not
supplied with kit) to opposite hose of brush
grapple. This assures same valve control
each time connected.
3. Attach male and female hydraulic quick
couplers (not supplied in kit) to hydraulic
source from tractor.
4. Electric third function kit diverts oil from
bucket tilt cylinders to power claws. This
option is preferred if you want to power
claws using the joystick.
ASSEMBLY MANUAL
Keep With Operator’s Manual
BRUSH GRAPPLE KIT
FRONT END LOADERS

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PARTS LIST - GRAPPLE KITS
Item Part No. Description Qty./60” Qty./72” Qty./84”
1 55875 WDMT, BRUSH GRAPPLE ARM 2 2 2
2 8727A HYDRAULIC CYLINDER 2 2 2
3 8354 PIN, HYD. CYLINDER 4 4 4
4 42502-15 WASHER, FLAT, 1”, N-SAE, YDP 8 8 8
5 41903-9 COTTER PIN, 3/16 X 2 8 8 8
6 41902-31 CLEVIS PIN 1 X 2”, TCP 4 4 4
7 32845-2 TUBE ADAPTER, ELBOW,SHORT 4 4 4
8 55862-1 FITTING,TEE, BULKHEAD W/LKNUT 2 2 2
9 55619 NUT/ LOCK BULKHEAD 3/4 - 16 (INCLUDED IN ITEM 8)
10 52308-1 HOSE #8-8FJX90 SHORT-8MB-72 LG 2 2 2
11 34853-46 NYLON SLEEVE 2.06 X 48” 1 1 1
12 51448 DECAL, RHINO LOGO, RIGHT 1 1 1
13 49696 DECAL, RHINO LOGO, LEFT 1 1 1
14 36844-4 HOSE #6 -8FJX -8FJX -35 LG 2 2 2
15 36844-14 HOSE #6 -8FJX -8FJX -44 LG 2 2 2
16 48857 DECAL,WARNING 2 2 2
17 D516 DECAL,DANGER-CRUSH HAZARD 2 2 2
15
14
13
12
16
11
1
2
3
4
5
6
7
8
9
10
1
5
4
3
5
17
FIGURE 1
BRUSH GRAPPLE ASSEMBLY

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PARTS LIST - HYDRAULIC CYLINDER 8727A
Item Part No. Description Qty.
8727A HYDRAULIC CYLINDER 2-1/2 X 8 --
1 00774729 CLEVIS CAP 2.5-3/4 ORB-1.00 1
2 00774734 ROD CAP 2.50-1.25-3/4 ORB 1
3 00774730 PISTON 2.5-0.75-S HALL W/RING 1
4 00774753 ROD CYL 1.25-08-0.75-1.25-A 1
5 3047111 CYLINDER TUBE 1
6 3047112 ROD,TIE 3/8 X 8 4
7 3047117 THREAD LOCK 1
8 1917140 ROD CLEVIS 1
9 00774740 SC SCKT SET 3/8UNCX1/2 KNUR 1
10 33003H5C HEX NUT 3/8-16 GR.5 8
11 5JRC12160 LOCKNUT TLM 3/4 NF PLC 1
12 1917132 O-RING PLUG,3/4-16 UNF,SOCKET 1
13 00774760 SEAL KIT FOR 8727A & 8728A CYL 1
13
12 11
1
2
3
4
5
6
7
8
9
10
10
613
10
10
1010
13
STROKE 8.00 RETRACTED 20.25
EXTENDED 28.25
2 ½
1 1/8
2 1/8
ROD DIA. 1.25
PORTS 3/4-16ORB
SIDE VIEW
NOT TO SCALE
2 1/16
2 ½ 1 1/8
1.0150 DIA.
HOLES
1.0150 DIA.
HOLES
FIGURE 2
HYDRAULIC CYLINDER & COMPONENTS

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ATTACHING BRUSH GRAPPLE TO
LOADER BOOM
No tools are needed to install quick attach
brush grapple. Loader must be equipped
with skid steer quick attach male coupler.
WARNING: To avoid injury during
attachment or detachment, do not
allow bystanders within 10 feet of
loader or attachment.
1. Remove attachment from loader and store
properly.
2. Locate tractor and brush grapple on level
ground. Lower boom to rest on ground.
Extend the bucket cylinders slightly, while
raising the boom to provide 3 to 5” of
ground clearance. Drive the tractor forward
slowly toward the brush grapple, aligning
the loader quick attach device.
3. While driving the tractor ahead slowly to
maintain contact with the brush grapple,
activate the lift cylinders to raise the loader
boom until the male quick attack engages
the female attachment lip.
4. Activate the bucket cylinders to retract,
continuing to roll the brush grapple back
completely.
5. Place tractor in neutral, set parking brake,
and shut off tractor. Rotate the quick
attach latch handles down in engage the
latch pins.
6. Start tractor and raise brush grapple 1
to 2 feet off ground and extend bucket
cylinders to tilt brush grapple at a slight
downward angle, so quick attach latch
pins are visible. Visually inspect the brush
grapple to verify the pins are engaged
through the latch plate on the back of the
brush grapple.
NOTE: If the brush grapple is not securely
attached, follow the instructions for
detaching it and repeat the above
procedure.
7. Lower loader boom to ground, place
tractor in neutral, set parking brake, and
shut off tractor. Move valve joystick to
relieve hydraulic pressure in all lines.
Connect brush grapple hydraulic hoses to
auxiliary hydraulic source (rear remotes,
3rd function kit) to operate the claws. Set
hydraulic speed control to “slow” for claw
operation.
8. Start tractor and cycle the grapple claws
a number of times to purge air from
cylinders. Check tractor hydraulic reservoir
and replenish with tractor manufactures
recommended hydraulic uid.
OPERATING BRUSH GRAPPLE
Operation of your tractor and loader with brush
grapple attachment requires additional consid-
erations from bucket operation. You now have
to operate the brush grapple while already op-
erating the tractor and loader. You need to also
take into account additional space require-
ments (added length and height) needed be-
cause of attached brush grapple.
GRASPING BRUSH
o Approach the pile with claw open and
bottom level. Use loader boom oat
position, if material is on the ground.
o Ease valve control lever for grapple claw
forward to close grapple claw around
material pile.

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DETACHING BRUSH GRAPPLE
WARNING: To avoid injury during
attachment or detachment, do not
allow bystanders within 10 feet of
loader or attachment.
1. Locate tractor and loader on level ground.
2. Lower boom arms until brush grapple is
level and resting on the ground.
3. Remove hydraulic pressure from the claw
hydraulic cylinders by moving the valve
lever.
4. Place tractor in neutral, set parking brake,
shut off engine. Move valve joystick to
relieve hydraulic pressure in all lines.
Dismount tractor and disconnect the
claw cylinder hydraulic hoses and store
off the ground on brush grapple. Rotate
the handle of the quick attach device to
disengage the latch pins.
5. Start tractor, release brake, and extend
bucket cylinders while slowly backing the
tractor away from the brush grapple, until
quick attach disengages.
6. Back away slowly.
LIFTING AND CARRYING LOAD
o Ease loader control valve back to lift and
roll brush grapple back.
o Position brush grapple low for maximum
stability and visibility whether brush
grapple is loaded or empty.
o Use extreme care when operating loader
on a slope. Carry load as low as possible.
This keeps the center of gravity of brush,
tractor and loader low and will provide
maximum tractor stability.
o Even on level ground, transport brush
grapple and load as low as possible to
avoid tipping in case a wheel drops in a rut
and to avoid overhead power lines.
DISPOSING OF BRUSH
o Lift brush grapple high enough to allow
tipping brush grapple. Move tractor toward
brush pile and extend bucket cylinder to
position in dump attitude.
o Gradually open claws, allowing material to
drop out.
o Back away from brush pile, rotate brush
grapple level and lower loader boom
toward ground, and then retract the claws.
DECAL P/N 48857 DECAL P/N D516
WARNING
Crushing Hazard
Pin
Attachment
Loader
Bracket
Gap
To Avoid Serious Injury or Death
Make sure attachment is
securely attached to loader.
See Operator's Manual for
instructions.
Lock both levers down.
Make sure pins are adequately
extended through slots at the
bottom of the attachment
bracket and the tapered side of
pin is firmly seated against
attachment slots.
Make sure the gap is no larger
than 1/8”.
Tilt attachment down, lower to
ground, apply down pressure,
and drag backwards.
Do not use attachment if it
disengages.
NEVER walk or work
underneath raised loader or
attachment.
D516
48857
Stand clear of
open grapple.
Park unit with
grapple closed.
Adjust hydraulic
flow to slowest
speed on grapple
function.
Read operator's
manual.
Failure to comply could result
in death or serious injury.
P

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INSTALLATION INSTRUCTIONS
AMERICAN STANDARD CAP SCREWS METRIC CAP SCREWS
GENERAL TORQUE SPECIFICATIONS
USE THE FOLLOWING TORQUES WHEN SPECIAL TORQUES ARE NOT GIVEN
SAE Grade
Typ. Head
Markings
Metric Class
Typ. Head
Markings
5 8 8.8 10.9
Cap Screw TORQUE
Assembly Torque
TORQUE TORQUE TORQUE
Size FT·LBS N·m FT·LBS N·m FT·LBS N·m FT·LBS N·m
Inches MIN MAX MIN MAX MIN MAX MIN MAX
6.25 7.25 8.5 10 8.25 9.5 11 13
8 9 11 12 10.5 12 14 16
14 15 19 20 18.5 20 25 27
17.5 19 23 26 23 25 31 34
26 28 35 38 35 37 47.5 50
31 34 42 46 41 45 55.5 61
41 45 55.5 61 55 60 74.5 81
51 55 69 74.5 68 75 92 102
65 72 88 97.5 86 96 116 130
76 84 103 114 102 112 138 152
95 105 129 142 127 140 172 190
111 123 150 167 148 164 200 222
126 139 171 188 168 185 228 251
152 168 206 228 203 224 275 304
238 262 322 355 318 350 431 474
274 305 371 409 365 402 495 544
350 386 474 523 466 515 631 698
407 448 551 607 543 597 736 809
537 592 728 802 716 790 970 1070
670 740 908 1003 894 987 1211 1337
Swivel Nut
or Hose
Connection
F. F. F. T.
Tube
Connection
F. F. F. T.
ft.·lb.in.·lb.
Thread
Size
Size
Assembly Torque
ft.·lb.in.·lb.
Swivel Nut
or Hose
Size F. F. F. T.
-4
2
3
4
5
6
8
10
12
14
16
20
24
32
5/16 - 24
3/8 - 24
7/16 - 20
1/2 - 20
9/16 - 18
3/4 - 16
7/8 - 14
1 1/16 - 12
1 3/16 - 12
1 5/16 - 12
1 5/8 - 12
1 7/8 - 12
2 1/2 - 12
90 ± 5
170 ± 10
220 ± 15
260 ± 15
320 ± 20
570 ± 25
1060 ±50
1300 ± 50
1750 ±75
1920 ± 125
2700 ± 150
3000 ± 150
3900 ± 200
7.5 ± 0.5
14 ± 1
18 ± 1
22 ± 1
27 ± 2
48 ± 2
90 ± 5
110 ± 5
145 ± 6
160 ± 6
225 ± 12
250 ± 12
325 ± 15
1 ± .25
1 ± .25
1 ± .25
1 ± .25
1.5 ± .25
1.5 ± .25
1.5 ± .25
1.5 ± .25
1.5 ± .25
1.5 ± .25
1.5 ± .25
1.5 ± .25
1.5 ± .25
7/16 - 20 140 ± 10 12 ± 1 2 2
-5 1/2 - 20 180 ± 15 15 ± 1 2 2
-6 9/16 - 18 250 ± 15 21 ± 1 1 1/2 1 1/4
-8 3/4 - 16 550 ± 25 45 ± 5 1 1/2 1
-12 1 1/16 - 12 1000 ± 50 85 ± 5 1 1/4 1
-16 1 5/16 - 12 1450 ± 50 120 ± 5 1 1
-20 1 5/8 - 12 2000 ± 100 170 ± 10 1 1
-24 1 7/8 - 12 2400 ± 150 200 ± 15 1 1
-32 2 1/2 - 12 3200 ± 200 270 ± 20 1 1
MIN MAX MIN MAX MIN MAX MIN MAX
6 8 8 11 9 11 12 15
16 20 21.5 27 23 27 31 36.5
29 35 39 47 42 52 57 70
52 62 70 84 75 91 102 123
85 103 115 139 120 146 163 198
130 158 176 214 176 216 238 293
172 210 233 284 240 294 325 398
247 301 335 408 343 426 465 577
332 404 450 547 472 576 639 780
423 517 573 700 599 732 812 992
637 779 863 1055 898 1098 1217 1488
872 1066 1181 1444 1224 1496 1658 2027
1/4 - 20
1/4 - 28
5/16 - 18
5/16 - 24
3/8 - 16
3/8 - 24
7/16 - 14
7/16 - 20
1/2 - 13
1/2 - 20
9/16 - 12
9/16 - 18
Cap Screw
Size
Millimeters
M6 x 1.00
M8 x 1.25
M10 x 1.50
M12 x 1.75
M14 x 2.00
M16 x 2.50
M18 x 2.50
M20 x 2.50
M22 x 2.50
M24 x 3.00
M27 x 3.00
M30 x 3.00
5/8 - 11
5/8 - 18
3/4 - 10
3/4 - 16
7/8 - 9
7/8 - 14
1 - 8
1 - 14
37° JIC Fittings
Standard American and Metric Cap Screws
SAE O-Ring Fittings
NOTE: These values apply to fasteners as received
from supplier, dry or when lubricated with normal
engine oil. They do not apply if special graphite or
molysulphide greases or other extreme lubricants are
used.
Swivel Nut
Torque
Swivel
Nut Hex
Size
(in.)
Thread
Size
(in.)
Dash
Size
-3
-4
-5
-6
-8
-10
-12
-14
-16
-20
-24
-32
5
6
8
10
12
16
20
22
25
32
38
50.8
--
9/16 - 18
--
11/16 - 16
13/16 - 16
1 - 14
1-3/16 - 12
1-3/16 - 12
1-7/16 - 12
1-11/16 - 12
2 - 12
--
--
11/16
--
13/16
15/16
1-1/8
1-3/8
--
1-5/8
1-7/8
2-1/4
--
--
16
--
24
50
69
102
102
142
190
217
--
--
N·m lbf·ft
12
--
18
37
51
75
75
105
140
160
--
O-Ring Face Seal Tube/
Hose Swivel Nut
Metric
Tube
O.D.
(mm)