Cherry CHERRYMAX G746A User manual

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
1
1335 E. Warner Ave,
Santa Ana, Ca 92805
Tel: [phone]
Fax: [phone]
www.cherryaerospace.com
Original Instructions
G746A
COMPACT CHERRYMAX®
POWER TOOL

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
2
LOCTITE® is a registered trademark of Henkel Corporation
DEXRON®is a registered trademark of GM Corporation.
PARKER®is a trademark of Parker Hannifin Corporation
LUBRRIPLATE
®
is a trademark of Fiske Brothers Refining Co.
THE G746A TOOL
TABLE OF CONTENTS
Description ........................................................................................................................................................................................3
Technical Specifications.....................................................................................................................................................................3
Putting the Tool in Service..................................................................................................................................................................3
General Operation Safety Warnings...................................................................................................................................................4
Operating Instructions .......................................................................................................................................................................5
Pulling Head Selection for Blind Fasteners ....................................................................................................................5
Pulling Head Selection for Cherry Rivetless Nutplate Products......................................................................................6
Pulling Head Extensions Available ................................................................................................................................6
Riveter Repair and Maintenance .......................................................................................................................................................7
Tools and Service Kits Needed ..............................................................................................................................................7
Service Procedure...................................................................................................................................................................8
Head Cylinder Subassembly ..........................................................................................................................................8
Handle Subassembly .....................................................................................................................................................8
Air Valve Subassembly ..................................................................................................................................................8
Component List and Other Accessories ..................................................................................................................................9
Cross Section View ...............................................................................................................................................................10
Top Assembly (G746A) – Exploded View..............................................................................................................................11
Head Cylinder Subassembly (845-016) - Exploded View......................................................................................................12
Power Handle Subassembly (704-086) - Exploded View ......................................................................................................13
Priming the Hydraulic System ...............................................................................................................................................14
Recommended Hydraulic Fluids ..................................................................................................................................14
Fluid Handling Safety ...................................................................................................................................................14
Bleeding Instructions ....................................................................................................................................................15
Troubleshooting Guide.....................................................................................................................................................................15
Declaration of Conformity ................................................................................................................................................................16
DESCRIPTION
Seller warrants the goods conform to applicable specifications and drawings and will be manufactured and inspected according to generally accepted practices of
companies manufacturing industrial or aerospace fasteners. In the event of any breach of the foregoing warranty, Buyer’s sole remedy shall be to return defective
goods (after receiving authorization from Seller) for replacement or refund of the purchase price, at the Seller’s option. Seller agrees to any freight costs in
connection with the return of any defective goods, but any costs relating to removal of the defective or nonconforming goods or installation of replacement goods
shall be Buyer’s responsibility. SELLER’S WARRANTY DOES NOT APPLY WHEN ANY PHYSICAL OR CHEMICAL CHANGE IN THE FORM OF THE
PRODUCT IS MADE BY BUYER.
THE FOREGOING EXPRESS WARRANTY AND REMEDY ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES AND
REMEDIES; ANY IMPLIED WARRANTY AS TO QUALITY, FITNESS FOR PURPOSE, OR MERCHANTABILITY IS HEREBY SPECIFICALLY
DISCLAIMED AND EXCLUDED BY SELLER. THIS WARRANTY IS VOID IF SELLER IS NOT NOTIFIED IN WRITING OF ANY REJECTION OF
THE GOODS WITHIN ONE (1) YEAR AFTER INITIAL USE BY BUYER OF ANY POWER RIVETER OR NINETY (90) DAYS AFTER INITIAL USE OF
ANY OTHER PRODUCT.
Seller shall not be liable under any circumstances for incidental, special or consequential damages arising in whole or in part from any breach by Seller, AND
SUCH INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES ARE HEREBY EXPRESSLY EXCLUDED.
For more information please contact our Technical Services Department at Tel. [phone]
WARRANTY

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
3
The Cherry® G746A riveter is a compact but powerful riveter designed for
high productivity, reliable installation of Cherrymax AB, Cherrylock A
wiredraw blind fasteners, MBC and nutplate blind rivets.
TECHNICAL SPECIFICATIONS
Cherry® Aerospace (CHERRY®) policy is one of continuous development.
Specifications shown in this document may be subject to change which may
be introduced after publication. For the latest information always consult
CHERRY®.
AIR PRESSURE 90 to 120 PSI (6.2 to 7.6 bar)
STROKE 0.875 inch (22.23 mm)
MIN. PULLING-FORCE: 1850 lbs. @ 90 psi (8.23 kN @ 6.2 bar)
WEIGHT 4.25 lbs. (2.26 kg)
CYCLE TIME One Second Approximately
NOISE LEVEL 72 dB (A)
VIBRATION Less than 2.5 m/s2
AIR CONSUMPTION 3.9 CFM (110.5 liters/M) at 20 Cycles/Minute
PUTTING THE TOOL IN SERVICE
The tool must be used with an air pressure regulator. Even if your
shop air pressure is below the maximum recommended range, pressure spikes in your air-lines could cause serious damage to
the tool or cause safety concerns.
Tools equipped with an in-line Air Pressure
Regulator (P1505) may be attached to any shop
air-line.
Tools NOT equipped with an in-line Air Pressure Regulator
(P1505) MUST be connected to a dedicated regulated air-line.

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
4
GENERAL OPERATION and SAFETY WARNINGS
•Wear proper PPE(Personal Protection equipment) when operating, servicing or repairing this tool
•Read Manual; operators must be trained in safety and correct tool operation
•Service and repairs shall be performed only by trained personnel.
•Do not pull rivet in the air or directed at any person.
•Do not use the tool with a damaged or missing stem deflector
•Rotate the Stem Deflector facing away from the operator or critical aircraft structure; use
a Stem Catcher if possible.
•Do not pound on the rear of the tool head to force rivets into holes.
•Make sure that the air muffler is not obstructed and is directed away from people.
•Do not exceed the recommended air pressure.
To ensure safety, use the pre-set air pressure regulator P/N P1505.
•Make sure to disconnect from the air supply before service or repair.
•Wash thoroughly after handling hydraulic fluid.
•Unauthorized modifications, including using substitute components will void warranty
and shall be at the customer's entire responsibility.
•Do not use any substitutions as they will impact the tool safety and reliability life.

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
5
OPERATING INSTRUCTIONS
Before using the tool:
CAUTION
•Read the tool manual instructions; before first using the tool.
•Read and comply to all safety instructions given in this document in addition to the general safety rules applicable
•Make sure the tool is connected to an air source operating within the recommended pressure range
•Before installing the permanent fasteners, make sure that the structure is properly clamped with temporary fasteners
•Make sure that the correct pulling head is selected for the fastener to be installed and that the tool is in good working condition
Installing Fasteners: Place the fastener into the prepared hole then place the pulling head over its stem and depress the trigger.
PULLING HEAD SELECTION FOR BLIND FASTENERS
•The lists given below are for reference only; for more up to date and detailed information, please check on the Cherry
Aerospace webpage as following: Installation Tooling Manuals(links to current tool manuals) and Product Expert (interactive
database for tool recommendations)
Fastener Type
Part Number
PH to use
Type Adapter Rivet Diameters Max. Grip1
CherryMAX®Bulb
(CR3XXX)
Cherry SST
(CR6XXX)
H701B-456
Straight
NONE
-4, -5 & -62
All
H747-4565
NONE
-4, -5 & -62
All
H753A-4565
Right Angle NONE
-4, -5 & -62
All
H781-456, H781A-456
Offset
NONE
-4, -5 & -62
All
H782
NONE
-4, -5 & -62
All
CherryMAX®AB
(CR4XXX)
H701B-456 Straight NONE
-4, -5 & -62
-091
H747-4565
NONE
-4, -5 & -62,3
-091
H753A-4565
Right Angle
NONE
-4, -5 & -62,3
-04
H781-456, H781A-456
Offset
NONE
-4, -5 & -62,3
-071
H782 NONE
-4, -5 & -62,3
-071
MaxiBolt® S
(CR7XXXS)
H701B-456
Straight
NONE
-4 only
All
H747-4565
NONE
-4 only
All
H753A-4565
Right Angle
NONE
-4 only
All
H781-456, H781A-456
Offset
NONE
-4 only
All
H782
NONE
-4 only
All
MBC L/C
(Lock Creator)
H701B-456
Straight
NONE
-4, -5 & -6
-042
H747-4565
NONE -4, -5 & -6 -042
H753A-4565
Right Angle
NONE
-4, -5 & -6
-04
H781-456, H781A-456
Offset
NONE
-4, -5 & -6
-042
H782
NONE
-4, -5 & -6
-042
MBC
(No Lock Creator)
H746-4MBC (0R 5MBC, 6MBC) Straight None -4, -5 OR -6 -042
CherryLock “A”
(CR2X7X)
H747-3A
Straight
NONE
-3 ONLY
-042
H955-3 (or -4, -5, -6)
NONE
-3, -4 & -5 3
-042
H886-3 (or -4, -5, -6)
Right Angle
NONE
-3, -4 & -5 3
-04
MS
4
(CR9XXX)
NPR (CCR274,
CCR284)
SPR (CR1233)
Tacking Rivet
(CCR294, CCR304)
H747-3NPR, H902-3NPR
Straight
NONE
-3 DIA. ONLY
All
H902-4NPR
NONE
-4 DIA. ONLY
All
H9015-3C (or -4C, -5C, -6C)
704A9
-3, -4, -5 & -6
All
H9040-4C (or -5C, -6C , -8C) 704A6 -4, -5, -6 & -8 All
Notes:
1 Longer grips may require a second activation of the trigger.
2 Nominal and oversized diameters.
3 Alloy Steel and Monel only; no -6 diameter (3/17) Aluminum.
4 Serrated stems only.
5 This tool may be set-up to install other types and sizes of fasteners; see Tool Manual for details.

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
6
PULLING HEAD SELECTION FOR RIVETLESS NUTPLATE PRODUCTS
Structures
Installation
Pulling Head
Removal Tool
For use with these RNP
products
ALUMINUM
H704-223NP
-
CNP06C3
H704-249NP R721-3-30
CNP01C3
CNP03C08, CNP03C3
CNP05C3
CNP14C3
CNP15CM4, CNP15CM5
H704-273NP
-
CNP56C3
H704-280NP R721-3-60
CNP11C08
CNP11C3
H704-295NP
-
CNP20C3
H704-223NP
-
CNP06C3
H704-295NP
-
CNP20C3
COMPOSITE
H704-275NPC
R721-275
CNP53C3
H704-290NPC
-
CNP63C3
PULLING HEAD EXTENSIONS AVAILABLE
Extension P/N
Extends Pulling Head by
Removal Tool
704A12-2
2"
Extension for straight pulling heads
704A12-4
4"
Extension for straight pulling heads
704A12-6
6"
Extension for straight pulling heads
704A12-12
12"
Extension for straight pulling heads
753B21
2-3/16"
Extension for H753A-456 and H886

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
7
RIVETER REPAIR AND MAINTENANCE
This riveter has been manufactured to give maximum service with minimum care.
In order to keep the tools in optimum operating condition, it is advisable to set-up a Preventive Maintenance check list
including, at a minimum, the following:
•Visually inspect the tool to make sure it is in good working condition and there are no fluid leaks
•Make sure the tool is bled regularly (page 15)
•Check the service sticker due date; service the tools on a regular basis.
Should repair or service be necessary, follow the instructions given below.
CAUTION
•Read the tool manual instructions; it is advised that repair is conducted only by properly trained personnel.
•Make sure the air is disconnected.
•Protect the sealing surfaces to avoid damage.
Tools and Service Kits Needed
•Make sure that the proper service kit (ordered separately) and tools are available.
oSERVICE KIT: G746AKS –(contains Springs, Seals, O-Rings and Back-up Rings
oTOOLS: G701/G704KT – tool kit and a Needle Nose Pair of Pliers
700A61
700B65
P1178
837B700
836B700
700A77
701A67
700A60

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
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SERVICE PROCEDURE
Tools Needed:
700B65 (Packing Plug Wrench), 700A61 (Piston Rod Wrench), 700A62 (Power Cylinder Tool), 700A60 (Seal Guide), 9/64” Hex
Key, A Bent Hook
Disassembly Instructions:
•Remove the Pulling Head (if any installed) then remove the Head Cylinder (1) by unthreading the four Cap Screws (19)
HEAD SUBASSEMBLY
Tools Needed:
701A67 (Seal Guide), 1-3/8 Standard Wrench, 1/8” and 9/64” Hex Keys
Disassembly Instructions:
•Remove back cap (12) and push the head piston (7) out carefully.
•O-rings (5, 8) and Back-up Ring (6) can be removed and replaced using a bent hook.
Re-assembly Instructions – Use the 701A67 Guide over the Piston threads to protect the seals.
•Replace all O-Rings and Backup rings then re-assemble by reversing the directions given above.
POWER HANDLE SUBASSEMBLY
Tools Needed:
700B65 (Packing Plug Wrench), 700A61 (Piston Rod Wrench), 700A62 (Power Cylinder Tool), 700A60 (Seal Guide), 9/64” Hex
Key, A Bent Hook
Disassembly Instructions:
•Remove the Head Cylinder (1) and set it aside
•Drain all the fluid, then turn up-side down and remove the bottom covers (39 through 43);
•Push the power piston all the way down and unthread the locknut (38) and then remove the air piston (37) by using wrench
700B65; hold the top of the piston with tool 700A61 to prevent it from turning. Push piston out when completely unthreaded
•Remove packing plug (34) with the help of wrench 700B65.
•Tap the power cylinder (26) from the top (use tool 700A62); when loosened, it will fall through the bottom of the handle.
•Remove all the seals and inspect all components for wear. Replace all seals and worn components
Assembly Instructions:
•The re-assembly sequence is the opposite of disassembly; to prevent damage to piston threads; suggested tightening torque
for the locknut (38) between 51 and 59 in.-lb. (5.65 and 6.67 N-m).
•After service, the riveter must be primed and bled (page 15)
AIR VALVE SUBASSEMBLY
Tools Needed:
P1178 (Valve Extractor), 836B700 (Spring Installation Tool), 837B700 (Valve Sleeve Removal Tool), Needle Nose Pliers
Disassembly Instructions:
•Remove retaining ring (55) and muffler (54).
•Pull out the valve plug (53) and the Valve Spool (48) with the help of extractor P1178;
•Dislodge and pull the spring (46) out using needle-nose pliers
•In the unlikely event that you want to pull the Valve Sleeve (45), use the tool 837B700 (internal expansion collet).
Assembly Instructions:
•Replace all O-Rings and apply an O-ring lubricant (Parker® silicone lube or equivalent).
•To re-assemble, reverse the procedure given above; snap the Spring (46) into its groove with the help of tool 836B700
•Make sure that all retaining rings are properly seated in their grooves. (41) and (55).

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
9
G746A – COMPONENT LIST AND OTHER ACCESSORIES*
P/N Description Qty P/N Description Qty
845-016 Head assy 120 704-086 Handle assy(continued) 1
845-019 Head Cylinder 1P830 O-ring 1
2A 845B6 Nose fitting 1700-248 Power piston rod 1
P701 O-ring 2 P727 O-ring 1
P998 Back-up ring 1P838 O-ring 2
P304 Quad Ring 1P115 Back-up ring 2
P106 Back-up ring 1700B93 Packing plug 1
845-017 Head piston 1P731 Back-up ring 2
P848 O-Ring 1P730 Quad ring 1
P572 Stat-o-seal 1700B6 Air piston 1
P573 Button head screw 1P737 Locknut 1
P244 O-ring 2 P725 O-ring 1
701B4 Back cap 1700B4 Handle base 1
P880 Retaining ring 1P735 Retaining ring 1
703A13 Deflect fitting 1700D107 Base cover 1
530A16 Pin deflector 1P736 Retaining ring 1
P112 Oring 1P653 O-ring 4
P832 O-ring 1 700B96 Valve sleeve 1
700A22 Gasket 1700A67 Spring 1
P27 Soc hd cap screw 4P829 O-ring 3
704-086 Handle assy 1700A94 Spool Valve Assy. 1
703A33 Trigger assy 149 700B95 Valve spool 1
22 P223 O-ring 1 50 700A18 Filter 1
23 703A32 Trigger sleeve 151 700A69 Metering screw 1
24 530A38 Trigger 1P834 O-ring 2
703A11 Handle 1700A16 Valve plug mold 1
700-247 Power cylinder 1700A17 Muffler 1
P833 O-ring 2 P279 Retaining ring 1
P739 Back-up ring 1
55
3
4
5
6
8
11
9
10
12
13
14
15
46
47
27
52
26
19
20
21
25
53
54
28
30
31
32
33
34
35
36
37
38
39
40
41
42
18
48
Item
Item
1
2
17
43
44
16
7
45
29
Do not use third party or substitute components, as it may cause significant damage to the tool.
Also recommended but not included with the riveter:
P/N
Description
Qty.
Comment
700A77
Air Bleeder
1
For Regular Up-Keep Of The Hydraulic System
P1505
In-Line Press. Regulator
1
To Prevent Air Spikes, If Regulated Air Is Not Available
670A20
Canvas Bag
1
For FOD Control (To Contain Spent Pins)
RIVAC 220-03
Vacuum Stem Collector
1
Use This Instead Of 670A20 For FOD Control
*Reference Cross Section Drawing G746A

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
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G746A – CROSS SECTION

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
11
G746A
TOP ASSEMBLY
ITEM
P/N
DESCRIPTION
QTY.
1
846-016
Head assy.
1
17
P832
O-ring
1
18
700A22
Gasket
1
19
P27
Soc. hd. cap screw
4
20
704-086
Handle assy.
1

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
12
HEAD CYLINDER ASSEMBLY
(845-016)
P/N Description Qty
845-016 Head assy 1
845-019 Head Cylinder 1
2A 845B6 Nose fitting 1
P701 O-ring 2
P998 Back-up ring 1
P304 Quad Ring 1
P106 Back-up ring 1
845-017 Head piston 1
P848 O-Ring 1
P572 Stat-o-seal 1
P573 Button head screw 1
P244 O-ring 2
701B4 Back cap 1
P880 Retaining ring 1
703A13 Deflect fitting 1
530A16 Pin deflector 1
P112 Oring 1
1
2
Item
3
4
5
6
7
13
14
15
16
8
9
10
11
12

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
13
POWER HANDLE ASSEMBLY
(704-086)
P/N Description Qty
P832 O-ring 1
700A22 Gasket 1
P27 Soc hd cap screw 4
704-086 Handle assy 1
703A33 Trigger assy 1
22 P223 O-ring 1
23 703A32 Trigger sleeve 1
24 530A38 Trigger 1
703A11 Handle 1
700-247 Power cylinder 1
P833 O-ring 2
P739 Back-up ring 1
P830 O-ring 1
700-248 Power piston rod 1
P727 O-ring 1
P838 O-ring 2
P115 Back-up ring 2
700B93 Packing plug 1
P731 Back-up ring 2
P730 Quad ring 1
700B6 Air piston 1
P737 Locknut 1
P725 O-ring 1
700B4 Handle base 1
P735 Retaining ring 1
700D107 Base cover 1
P736 Retaining ring 1
P653 O-ring 4
700B96 Valve sleeve 1
700A67 Spring 1
P829 O-ring 3
700A94 Spool Valve Assy. 1
49 700B95 Valve spool 1
50 700A18 Filter 1
51 700A69 Metering screw 1
P834 O-ring 2
700A16 Valve plug mold 1
700A17 Muffler 1
P279 Retaining ring 1
17
18
19
Item
35
32
33
34
36
20
21
25
54
26
27
28
37
38
39
40
41
29
30
31
55
47
48
42
43
44
45
46
52
53

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
14
PRIMING THE HYDRAULIC SYSTEM
RECOMMENDED HYDRAULIC FLUID
The riveter is supplied with Dexron® III ATF type “A”.
COMPATIBLE ALTERNATE FLUIDS
•Automatic Transmission Fluids: DEXRON IV, MERCON, Allison C4 or equivalent.
•Hydraulic Fluids: Hyspin® VG32 , Aeroshell fluid 4
CAUTION
•DO NOT MIX DIFFERENT TYPES OF HYDRAULIC OILS AND TRANSMISSION; HYDRAULIC AND TRANSMISSION
FLUIDS ARE NOT COMPATIBLE DIFFERENT TYPES OF FLUIDS MAY NOT BE COMPATIBLE WITH EACH OTHER.
•PHYSICAL PROPERTIES AND MATERIAL SAFETY DATA SHEETS FOR DIFFERENT FLUIDS MAY DIFFER FROM THE
ONE GIVEN BELOW, BUT THE SAFETY INFORMATION STILL APPLIES; CHECK WITH THE FLUID MANUFACTURER
FOR ADDITIONAL MSDS AND SPECIFIC PROPERTIES.
FLUID HANDLING SAFETY
ENVIRONMENTAL
•Waste Disposal in accordance with the applicable regulations
•Soak up spills with diatomaceous earth or other inert materials.
•Keep from drains, sewers and water courses.
•Filter and recycle used fluid; otherwise store and dispose of
according to the applicable regulations.
HANDLING
•Eye protection is required.
•Protective gloves, chemically resistant boots and apron are
recommended.
FIRST AID
•Flush eyes thoroughly with water.
•If irritation develops, consult a physician.
•To prevent inhalation, use in well-ventilated area.
•Short term exposure should pose no adverse health effects.
•If inhalation occurs, remove the affected person from the
contaminated area and apply artificial respiration if needed.
•DO NOT INDUCE VOMITING.
•Seek medical attention immediately.
In case of skin contamination:
•Wash thoroughly with soap and water as soon as possible.
•Brief skin contact requires no immediate attention.
•If irritation develops, consult a physician.
COMBUSTIBILITY
•It is slightly combustible when heated above flash point.
•It will release flammable vapors which can burn in open or be
explosive in confined spaces if exposed to source of ignition.
•Do not store near open flames or other sources of ignition.
•In case of fire, use only suitable extinguishing media:
CO2, dry powder, foam or water fog.
•CAUTION: DO NOT USE WATER JETS.
Specific gravity:
0.863
Weight per gallon:
7.18 lbs.
Open flash point:
>200°C (392°F)

TM-G746A Rev.: B DCR# 17-0231 DATE: 3/21/17 Federal Identification Code: 11815 © 2017 Cherry Aerospace
15
PRIMING THE TOOL
After service, the riveter must be primed with hydraulic fluid before re-assembling the head cylinder.
What is needed: 1/8” and 9/64” Hex Keys; 700A77 Bleed Bottle
Before priming, push power piston (30) all the way down.
•Fill the handle subassembly (20) with hydraulic fluid to about 1/8” below the top.
•Make sure that the O-Ring (17) and Gasket (18) are in place and assemble the Head Cylinder (1)
by tightening the cap screws (19) evenly, one at a time.
•Bleed the system per instructions below.
BLEEDING INSTRUCTIONS
This operation should be done when priming a serviced tool and as part of regular tool maintenance in
order to replenish the hydraulic fluid and remove the air bubbles from the hydraulic fluid.
What is needed: a 1/8” Hex Key; 700A77 Bleed Bottle
•Remove the side Screw (10) and attach the Bleeder Bottle 700A77 upside down (see on the right).
•Cycle several times, changing the position of the tool every few cycles; make sure the empty part of
the bleed bottle is always the highest part of the tool; note if there are air bubbles coming through
the bleed bottle. Continue cycling the tool until no more air bubbles are released into the bottle.
•When done, re-assemble the Screw (10) and Stat-O-Seal (9)
TROUBLESHOOTING GUIDE
PROBLEM POSSIBLE CAUSE LIKELY SOLUTION
Piston (7) does not
move after depressing
Trigger
1. No air supply is connected
2. Faulty trigger (21)
3. Faulty power piston( 28-30)
4. Valve Spring (46) not correctly installed
1. Make sure the riveter is connected to an air
source.
2. Remove and replace trigger assembly.
3. Service the Handle Subassembly (20).
4. Service the Air Valve; make sure the Spring is
properly engaged in its groove
Short piston stroke or
low pulling force
Air bubbles in the hydraulic fluid Bleed per instructions above
Head piston (7) is slow
or it seizes 1. Possible Head Cylinder (1) damage.
2. Dirty/Clogged air muffler (54)
1.Service the Head Cylinder
2.Clean muffler thoroughly with solvent and
back-blow with compressed air; replace if
necessary.
Fluid leakage at the
Head Cylinder (1) 1. Leaks around the gasket (18)
2. Leaks at the front or back of head cylinder (1)
1. Tighten screws (19) until no more leaks are
observed; if it still leaks, the gasket and
O-Ring (17, 18) must be replaced.
2. Replace O-Rings (3) and Backup ring (4)
Fluid leakage at the
side hole of the handle
Worn Packing Plug Seals (32,33) Service Handle (20)
Air leakage at the air
valve
1. Broken or dislodged valve spring (46)
2. Worn or damaged Valve Spool seals (47,52)
Service the Air valve (44 through 55)
Slow / Sluggish cycle Muffler(54) or Spool (48) are clogged up
Service the Air valve (44 through 55)

16
Declaration of Conformity
We, Cherry Aerospace
Located at 1224 East Warner Avenue, Santa Ana, CA 92705-0157, USA,
In accordance with the provisions of
Machine Directive 2006/42/EC
Hereby declare under our sole responsibility that:
Equipment: Pneumatic Hydraulic Hand Riveter
Model Number: G746A
Serial Number: _____________________ Date:______________
Is in conformity with the applicable requirements of the following standards:
EN ISO 12100:2010 Safety of Machinery; General Principles; Risk Assessment and Reduction
ISO/TR 14121-1&2:2007 Safety of Machinery, Risk assessment
EN 792-1:2000 + A1:2008 Safety requirements; Assembly power tools for non-threaded mechanical fasteners
ISO 8662-11 Hand-held portable power tools -- Measurement of vibrations at the handle
ISO 3744 Acoustics – Determination of sound power levels of noise sources
ISO 4413:2010. Hydraulic fluid power - General Rules of safety
ISO 4414:2010. Pneumatic fluid power - General Rules of safety
Signed by: ________________________________
Cris Cobzaru,
Sr. Technical Services / Installation Tooling Engineer
Master of Science in Mechanical Engineering
The Technical documentation for the machinery is available from:
Name: Karl-Heinz Beckers
Position: CE Representative and Western Europe Sales Manager
E-mail: [email protected]
Location: Germany
Mobile Phone [phone]
Or e-mail Cherry Technical Services at: SAO.T[email protected]m