model g5789/g5790
13-piece 3⁄4
"
impact Wrench Kit
instruction manual
Copyright © MAy, 2008 By grizzly industriAl, inC.
Warning: no portion of this manual may be reproduced in any shape
or form Without the Written approval of grizzly industrial, inc.
#jM10716 printed in tAiwAn
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7. avoid entanglements. do not
wear loose clothing, gloves, neck-
ties, rings, bracelets, or other jewel-
ry, which may get caught in moving
parts, when operating this tool. wear
a protective hair covering to contain
long hair.
8. use correct air pressure.
exceeding the maximum psi rating
of this tool may cause unpredictable
operation or bursting.
9. disconnect air pressure
before servicing, changing accesso-
ries, or moving to another location.
never leave this tool unattended
when connected to air.
10. secure tooling. Always verify
tooling is secure before operation.
11. sharp surfaces. do not
place hands near the tooling sur-
faces when in operation.
12. remove adJusting Keys and
Wrenches after use. these
tools become dangerous projectiles
if left on the tool when it is started.
13. avoid flammables. do not use
this tool around any flammables that
may be ignited by sparks.
14. secure WorK. use clamps or a
vise to hold work when practical. it is
safer than using your hand and frees
both hands to operate tool.
15. maintain tools With care.
Keep tools lubricated and clean
for best and safest performance.
Follow instructions for lubricating
and changing accessories.
16. do not force tool. it will do
the job better and safer at the rate
for which it was designed.
17. checK for damaged parts
before using. Check for bind-
ing and alignment of parts, broken
parts, part mounting, loose bolts,
and any other conditions that may
affect operation. repair or replace
damaged parts before operating.
18. use good lighting. Keep work
area well lighted. dark work areas
increase risk of accidental injury.
19. avoid unintentional opera-
tion. Always disconnect air when
not in use, and do not carry tool with
hand on trigger.
20. use
the
recommended
accessories. Consult owner’s
manual for recommended acces-
sories. using improper accessories
may increase the risk of injury.
21. never alloW untrained
users to use this tool While
unsupervised.
22. if you are unsure of the
intended operation, stop
using tool. seek formal training
or research books or magazines that
specialize in pneumatic tools.
23. be aWare of hose location.
hoses can easily become a tripping
hazard when laid across the floor in
a disorganized fashion.
24. do not use under the
influence of drugs or
alcohol, or When tired.
no list of safety guidelines is complete,
because every work environment is
different. always consider safety first
and use common sense. failure to
use this tool with caution and respect
could result in serious personal
injury.
3
-2-
Model g5789/g5790 13-piece ⁄4" impact wrench Kit
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inventory
1
⁄
4" npt
Case
3
Air
⁄
4" impact wrench
Fitting
F
e
d
g
C
B
h
A
4mm hex wrench
ITEM
G5789
26mm
27mm
29mm
30mm
32mm
35mm
36mm
38mm
G5790
1"
5mm hex wrench
A
B
C
D
E
F
1-1/16"
1-1/8"
1-3/16"
1-1/4"
1-3/8"
1-7/16"
1-1/2"
tool oil Bottle
G
H
figure 1. Model g5789/g5790 inventory.
3
Model g5789/g5790 13-piece ⁄4" impact wrench Kit
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-3-
operations
g5789 specifications
drive size............................................... 3⁄4
"
no-load speed ........................ 4,500 rpM
Maximum torque .......................... 500 ft/lb
1
Air inlet size ......................... 3⁄8" or ⁄4" npt
Air Consumption.............................. 7 CFM
operating pressure ......................... 90 psi
Maximum operating pressure....... 120 psi
weight ..............................................9.9 lbs
read the manual before operation.
become familiar with this tool, its
safety instructions, and its operation
before beginning any work. serious
personal injury may result if safety
or operational information is not
understood or followed.
g5790 specifications
drive size............................................... 3⁄4
"
no-load speed ........................ 4,500 rpM
Maximum torque .......................... 500 ft/lb
1
Air inlet size ......................... 3⁄8" or ⁄4" npt
Air Consumption.............................. 7 CFM
operating pressure ......................... 90 psi
Maximum operating pressure....... 120 psi
weight ..............................................9.9 lbs
lung/ear
inJury hazard!
Wear protective
equipment when
using this tool.
air supply
the impact wrench requires 90 psi to
operate correctly. to improve air tool
lifespan, use a filter/lubricator/regulator
setup shown in figure 2.
accidental
start hazard!
disconnect before
service or tool
changes.
Quick
Quick
Connector
Lubricator
Regulator
Connector
Your
Tool
Air
air pressure
hazard!
never exceed 120
psi.
Compressor
Quick
Coupler
Quick
Coupler
Air Hose
Filter
figure 2. installed filter lubricator
regulator.
eye inJury
hazard!
Wear protective
equipment when
using these tools.
3
-4-
Model g5789/g5790 13-piece ⁄4" impact wrench Kit
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otherwise, lubricate the impact wrench
daily with a 2–6 drops of pneumatic tool
oil directly into the tool's air inlet fitting, as
shown in figure 3, before and after each
use and every 2 hours of continued use.
to change the direction of rotation, push
the reverse valve toward the front of the
gun for clockwise rotation and to the rear
for counterclockwise rotation.
torque setting
reverse Valve
figure 4. impact wrench control locations.
daily maintenance
these procedures should be done after
each use:
figure 3. Manual oiling.
impact Wrench
•
Before putting the impact wrench away,
put 2-6 drops of oil into the air supply
fitting and momentarily operate the tool
to distribute the oil inside.
3
your new ⁄4" drive impact wrench (figure
3) will generate up to 500 ft/lbs. of torque.
only use thick-walled impact sockets
with this air tool. the common thin-walled
chrome sockets may explode if used as
impact sockets, causing serious injury.
•
wipe the tool exterior and sockets with
a slightly oiled cloth. your goal is to
leave a light film of oil on the tool to
prevent rust.
3
the impact wrench comes with a
⁄ "
8"–1⁄4
npt adapter. For maximum results, we
recommend using a 3⁄8" air fitting and hose.
to change the torque setting, turn the
torque setting knob from 0 to 9; 9 is the
highest torque setting.
3
Model g5789/g5790 13-piece ⁄4" impact wrench Kit
-5-
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g5789 impact Wrench
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REF PART #
DESCRIPTION
REF PART #
DESCRIPTION
1
P8125001 HOUSING
31
32
33
34
35
36
37
38
39
40
42
43
44
45
46
48
P8125031 COMPRESSION SPRING
P8125032 PIN
2
P8125002 VALVE SLEEVE
3
P8125003 REVERSE VALVE
P8125004 TRIGGER
P8125033 REAR GASKET
P8125034 REAR COVER
P8125035 CAP SCREW
4
5
P8125005 ROLL PIN
6
P8125006 VALVE BUSHING
P8125007 O-RING
P8125036 LOCK WASHER
P8125037 OIL SEAL
7
8
P8125008 STEEL BALL
P8125038 FRONT RUBBER
P8125039 EXHAUST DEFLECTOR
P8125040 ANVIL COLLAR
P8125042 PHLP HD SCREW
P8125043 RUBBER BUSHING
P8125044 REAR RUBBER
P8125045 SET SCREW
9
P8125009 COMPRESSION SPRING
P8125010 AIR FITTING 3/8"-1/4" NPT
P8125011 AIR VALVE KNOB
P8125012 O-RING
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
P8125013 SET SCREW
P8125014 SPACER
P8125015 OIL SEAL
P8125046 ROLL PIN
P8125016 PILOT SET SCREW
P8125017 ANVIL BUSHING
P8125018 ANVIL 3/4" DRIVE
P8125019 HAMMER CAGE
P8125020 HAMMER PIN
P8125021 HAMMER DOG
P8125022 DRIVE CAM
P8125023 O-RING
P8125048 SPECIAL CAP SCREW
*49 P8125049 O-RING KIT
50
51
52
53
54
55
56
57
58
59
60
61
PAW05M
PAW04M
HEX WRENCH 5MM
HEX WRENCH 4MM
P5789052 1/4" NPT AIR FITTING
P5789053 SOCKET 3/4 DRV X 26MM
P5789054 SOCKET 3/4 DRV X 27MM
P5789055 SOCKET 3/4 DRV X 29MM
P5789056 SOCKET 3/4 DRV X 30MM
P5789057 SOCKET 3/4 DRV X 32MM
P5789058 SOCKET 3/4 DRV X 35MM
P5789059 SOCKET 3/4 DRV X 36MM
P5789060 SOCKET 3/4 DRV X 38MM
P5789061 CARRYING CASE
P8125024 CYLINDER
P8125025 ROTOR
P8125026 ROTOR BLADE
P8125027 FRONT PLATE
P8125028 BEARING
P8125029 REAR PLATE
P8125030 WASHER
* not included; for aftermarket purchase only
3
-6-
Model g5789/g5790 13-piece ⁄4" impact wrench Kit
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g5790 impact Wrench
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REF PART #
DESCRIPTION
REF PART #
DESCRIPTION
1
P8125001
P8125002
P8125003
P8125004
P8125005
P8125006
P8125007
P8125008
P8125009
P8125010
P8125011
P8125012
P8125013
P8125014
P8125015
P8125016
P8125017
P8125018
P8125019
P8125020
P8125021
P8125022
P8125023
P8125024
P8125025
P8125026
P8125027
P8125028
P8125029
P8125030
HOUSING
31
32
33
34
35
36
37
38
39
40
42
43
44
45
46
48
*49
50
51
52
53
54
55
56
57
58
59
60
60
P8125031
P8125032
P8125033
P8125034
P8125035
P8125036
P8125037
P8125038
P8125039
P8125040
P8125042
P8125043
P8125044
P8125045
P8125046
P8125048
P8125049
PAW05M
PAW04M
P5789052
P5790053
P5790054
P5790055
P5790056
P5790057
P5790058
P5790059
P5790060
P5790061
COMPRESSION SPRING
PIN
2
VALVE SLEEVE
3
REVERSE VALVE
TRIGGER
REAR GASKET
4
REAR COVER
5
ROLL PIN
CAP SCREW
6
VALVE BUSHING
O-RING
LOCK WASHER
7
OIL SEAL
8
STEEL BALL
FRONT RUBBER
9
COMPRESSION SPRING
AIR FITTING 3/8"-1/4" NPT
AIR VALVE KNOB
O-RING
EXHAUST DEFLECTOR
ANVIL COLLAR
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
PHLP HD SCREW
RUBBER BUSHING
REAR RUBBER
SET SCREW
SPACER
SET SCREW
OIL SEAL
ROLL PIN
PILOT SET SCREW
ANVIL BUSHING
ANVIL 3/4" DRIVE
HAMMER CAGE
HAMMER PIN
HAMMER DOG
DRIVE CAM
SPECIAL CAP SCREW
O-RING KIT
HEX WRENCH 5MM
HEX WRENCH 4MM
1/4" NPT AIR FITTING
SOCKET 3/4 DRV X 1"
SOCKET 3/4 DRV X 1-1/16"
SOCKET 3/4 DRV X 1-1/8"
SOCKET 3/4 DRV X 1-3/16"
SOCKET 3/4 DRV X 1-1/4"
SOCKET 3/4 DRV X 1-3/8"
SOCKET 3/4 DRV X 1-7/16"
SOCKET 3/4 DRV X 1-1/2"
CARRYING CASE
O-RING
CYLINDER
ROTOR
ROTOR BLADE
FRONT PLATE
BEARING
REAR PLATE
WASHER
* not included; for aftermarket purchase only
3
Model g5789/g5790 13-piece ⁄4" impact wrench Kit
-7-
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