Marson MP-4V 39048 User manual

This newly designed heavy-duty air/hydraulic riveter is
ergonomically designed with the professional in mind. The light
weight 3.7 lbs. well balanced MP-4V includes a Vacuum system
and is designed to maximize a 1”stroke and 3,420 lbs. of pulling
force with a 3 jaw setup that gets the job done. The air supply can
be connected directly or you can use the supplied swivel air
connector with the attached hose for operator convenience. Each
tool is supplied with nosepieces to set 5/32”- 1/4”rivets in all
alloys. A 1/4" monobolt nosepiece is included in addition to
adjustment service wrenches, hydraulic fluid, fluid applicator,
spare jaws and an air off/on valve. The adjustable Vacuum
System control knob located on the side of the tool allows you to
control the force of the air needed to hold the rivet in place or you
may operate with the vacuum system turned off.
Recommended air pressure is 70-95 PSI.
MP-4V Heavy Duty Riveter / 39048
Alcoa Fastening Systems
1925 N MacArthur Dr
Suite 200
Tracy, CA 95376

AIR FEED
Use only compressed air. Check airline for damage from humidity &
contaminants. In order to protect the tool from premature wear, we
recommend the use of a filter, lubricator & regulator. Air connection
size ¼” NPT.
WARNING:
Do not use air supply greater than recommended or tool
may be damaged or burst.
1. Connect air supply then switch ON/OFF valve
to ON position
2. To turn on and adjust vacuum system rotate silver
knob on side of tool and turn it clockwise until
desired amount of vacuum is obtained to hold rivet
in place and eject spent mandrel into the collection
cup. If you don't want to use the vacuum system
rotate the silver knob counter-clockwise to shut it
off. The tool will still function but must be tilted
backwards to allow spent mandrel to fail into
collection cup.
ADDITION OF HYDRAULIC FLUID
1. Disconnect air supply to tool and switch ON/OFF valve to
OFF position.
2. Remove seal screw and seal (see Fig. 3)
3. Screw the priming pump of filled oil into the bleed screw
hole. Actuate the priming pump by pressing down and
releasing several times until resistance is felt. (Fig. 4)
4. Remove the priming pump and the excessive oil will flow
out. Wipe away and clean out the excessive oil and replace
the seal and screw.
IMPORTANT: Use only Anti-Foam Hydraulic Fluid
WARNING:
ALWAYS WEAR SAFETY GLASSES
WHEN OPERATING AND PERFORMING MAINTENANCE ON TOOL
LA-534

CHANGING NOSEPIECES
1. After selecting the correct size nosepiece for the rivet being used
Connect tool to air supply and pull trigger and hold trigger button.
2. Using wrench (supplied), unscrew nosepiece from frame head &
replace with proper size nosepiece. Tighten down with wrench. DO
NOT OVERTIGHTEN. Release trigger.
Your tool is now ready to work. Insert rivet mandrel into nosepiece. Insert
rivet into predrilled hole in application and pull trigger button and hold until
rivet sets then release the trigger. A second pull may be required.
CLEANING & CHANGING OF JAWS
With use, the jaws of the tool may become dirty or worn. This will cause
slipping of the rivet mandrel & and improper setting of the rivet. To clean
the jaws follow this procedure.
1. Disconnect air supply.
2. Use a suitable wrench, unscrew frame head and remove.
3. Using a pair of wrenches, disassemble front jaw case from rear jaw case.
DO NOT MOVE rear jaw case as this will affect tool operation.
4. To clean jaws, use a stiff dry wire brush.
5. If excessive wear is apparent, replace with new jaws.
6. Reassemble the jaw case assembly.
WARNING:
ALWAYS WEAR SAFETY GLASSES
WHEN OPERATING AND PERFORMING MAINTENANCE ON TOOL

Part Number
AFS Part No.
Description
1
M95300
5/32" Nosepiece
1
M95301
3/16" Nosepiece
1
M95302
1/4" Nosepiece (Standard)
1
M95303
1/4" Nosepiece(Monobolt)
2
M95304
O-Ring (meas.9x1)
3
M95305
Nosepiece casing
4
M95306
O-Ring (meas.22x2)
5
M95307
Jaw housing
6
M95308
Jaws (3pcs)
7
M95309
Pusher
8
M95310
Washer
9
M95311
Jaw pusher spring
10
M95312
Lock ring
11
M95313
Housing
12
M95314
Polyurethane ring (meas. 16x2)
13
M95315
Set nut
14
M95316
Polyurethane ring (meas. 14.3x2)

Part Number
AFS Part No.
Description
15
M95317
O-Ring (meas. 13x16x1.5)
16
M95318
Vacuum sleeve
17
M95319
Seal plastic housing
18
M95320
Sealing ring (meas.2 5x13.5x3.5)
19
M95321
Head assembly
20
M95322
Lip Seal (meas.14x11x6.3)
21
M95323
O-Ring 48
22
M95324
O-Ring (meas. 26.7x3 26x1.78)
23
M95325
Lip Seal (22x30x6)
24
M95326
Axis
25
M95327
Buffer
26
M95328
O-Ring (meas.35x1.5)
27
M95329
EL(meas. 8x14x5)
28
M95330
End cap
29
M95331
Plastic ring (3 3x21x1.8)
30
M95332
Stem collector adaptor
31
M95333
O-Ring (meas.24x2)
32
M95334
O-Ring (meas.47x1.5)
33
M95335
Stem collector outer
34
M95336
Stem Collector body
35
M95337
Retaining nut
36
M95338
Silencer
37
M95339
Stem collector end cap
38
M95340
Silence
39
M95341
Silencer cap
40
M95342
Handle (left)
41
M95343
Handle (right)
42
M95344
Trigger
43
M95345
Trigger valve
44
M95346
On/Off base
45
M95347
O-Ring (meas.6x1)
46
M95348
Air interface
47
M95349
Tie ring
48
M95350
Air tube
49
M95351
Regulatable button
50
M95352
Retaining screw (meas.3x3)
51
M95353
Vacuum valve
52
M95354
O-Ring (meas. 4x6x1)
53
M95355
Tapping screw (meas.3x10)

IF further maintenance is beyond the scope of this direction sheet and the tool fails to
function properly, contact the factory or return it to the factory for service. Contact our Tool
Repair Center at 317-704-8874 for further information.
LIMITED TOOL WARRANTY
Alcoa Fastening Systems - Marson division warrants that this tool will be free from defects
in material and workmanship under normal service and for ninety (90) days from the date
of purchase. This warranty applies to the purchaser of the tool for original use only. All
other warranties, whether expressed or implied, including any warranties of merchantability
or fitness for purpose are hereby excluded.
Should this tool fail during this ninety (90) day period, and no unauthorized repairs have
been made, return the tool freight prepaid to the factory for free of charge replacement of
any part or parts found by Alcoa Fastening System - Marson division to be defective due to
faulty material or workmanship. This represents the sole obligation of Alcoa Fastening
Systems - Marson under this warranty. In no event shall Alcoa Fastening Systems - Marson
division be liable for any consequential or special damages arising from the purchase or use
of this tool. You may have other rights which vary from state to state.