1925 N MacArthur Dr.
Suite 200
Tracy, CA 95376
M-4 Pneumatic/Hydraulic Riveting Tool / 39058
The Marson M-4 pneumatic/hydraulic riveting tool is designed to set rivets
in all alloys in sizes from 3/32” to 1/4” diameter. Capable of setting 3/16”
and 1/4” T-Rivets/Klik-Split®, Klik-Lock and other structural blind rivets
(optional nosepiece may be required). Model M-4 is supplied with 1/4”
nosepiece installed in the operating position. Standard nosepieces for
3/32”, 1/8”, 5/32”, and 3/16” diameter rivets are included among the
accessories supplied with the tool.The recommended air pressure is 95
PSI.
Weight: 4 lbs.
Safety glasses should be worn at all times while operating tool.
General Information
The Marson M-4 pneumatic/ hydraulic riveting tool is designed to set
rivets in all alloys in sizes from 3/32” to 1/4” diameter. Capable of
setting 3/16” and ¼” T-Rivets/Klik-Split®, Klik-Lock and other
structural blind rivets (optional nosepiece may be required). Model
M-4 is supplied with 1/4” NOSEPIECE (1A) installed in the
operating position. Standard nosepieces for 3/32” (1B), 1/8” (1C),
5/32” (1D), and 3/16” (1E) diameter rivets are included among the
accessories supplied with the tool.
The Maximum Air Pressure is 95 PSI At Tool.
Specifications
Rivet Setting Capacity 1/4” diameter
Traction power 3099 lbs
Operating air pressure 85-95 PSI
Air consumption 5 CFM
Air Inlet 1/4” N.P.T.
Overall height 12”
Net weight 6.6 lbs.
Accessories
The M-4 is packaged in a compartment storage container.
Wrenches needed to service the tool are included. Special SPANNER
(56) and SPANNER GAUGE (57) has a cut-out gauge used in
adjusting the tool as described below.
Also included: Safety Cap (20) to catch ejected mandrels when
attached to the back of the tool.
Maintenance
In order to achieve maximum efficiency and economy, the Marson
M-4 pneumatic/hydraulic riveting tool should be serviced and
maintained on a regular basis. No special skills or tools other than
the ones provided are needed to properly service and maintain the
device.
The operative parts of the tools requiring regular inspection and
maintenance are as follows:
1. The JAWS (16) should be periodically inspected, cleaned, and
when necessary, replaced with new jaws (see Cleaning and
Changing Jaws under Procedures below).
2. Changing Nosepiece
Connect M-4 to air pressure and press TRIGGER (37) until
nosepiece has been removed and new nosepiece fully tightened.
When TRIGGER (37) has been released and tool is at rest there
should be a circular opening visible in the nosepiece.
Malfunction
1. Mandrel gripped by JAWS but rivet does not set and mandrel
does not break:
CAUSE: Low air pressure or loss of oil.
REPAIR: Increase air pressure but do not exceed 95 PSI at tool.
Make sure all fittings including FRAME CAP (19) and FRAME
HEAD (2) are tight. If malfunction persists, add oil as follows:
Disassemble AIR CYLINDER (58), FRAME (53) and FRAME
HEAD (2). Before adding oil, check to be sure OIL PISTON (12) is
at the bottom of its stroke, by hand pulling JAW CASE FRONT (3A,
3B) away from FRAME (53). OIL PISTON (12) should bottom its
stroke automatically when removing FRAME HEAD (2). If JAW
CASE FRONT (3A, 3B) moves downward by hand power, then
RETURN SPRINGS (15, 16) may need replacing. Care must be
exercised to avoid damage to O-RINGS (10, 11). Pour MARSON
OIL No. 39105 or equivalent into HYDRULIC ROD GUIDE (25)
while tool is upside down. Before assembling also check for oil
appearing in AIR CYLINDER (58) or FRAME HEAD (2). If oil is
found in any of these areas, replace O-RING (10, 11, 22, 23) as
needed. Reassemble tool.
2. Mandrel does not enter nosepiece OR fails to eject.
CAUSE: JAW CASE REAR (6) and NUT (6) have changed
position.
REPAIR: Adjust so that the distance between the plane underside of
the FRAME (53) and the front edge of the securely-assembled JAW
CASE FRONT (3A, 3B) is approximately 3-3/8”. This can be
measured with the cut-out gauge on SPANNER GAUGE (57) before
assembling FRAME HEAD (2).
3. Tool takes more than one stroke under ideal conditions to set
rivet and break mandrel.
CAUSE: Insufficient oil.
REPAIR: See repair instructions under Malfunction, 1.
CAUSE: Not enough air pressure.
REPAIR: Increase air pressure but do not exceed 95 PSI at tool.
2. The FRAME (53) of the tool should be checked periodically to
ensure that the oil level is maintained and that there are no leaks
or breakdowns in the seals. (See Repair sections under
Malfunction for procedures).
Maintenance Procedures
1. Cleaning and Changing Jaws
IMPORTANT – Disconnect the M-4 from the air pressure line
before proceeding with inspection or repairs. Use SPANNER (56)
to remove FRAME HEAD (2) and JAW CASE FRONT (3). At the
same time, hold the JAW CASE REAR (6) with the SPANNER
GAUGE (57). Clean jaws with solvent or a steel brush. Replace
with new jaws if excess wear is apparent. Always coat outer or
smooth surface of jaws with an oil film before assembling.
Reassemble by reversing order of above procedure. It is important
that JAW PUSHER (5) engages the conical parts of the JAWS. DO
NOT CHANGE THE POSITION OF PARTS (6) and (9). If these
parts are inadvertently changed, see readjustment instructions under
“Malfunction.”
CAUSE: Loose nosepiece.
REPAIR: Tighten nosepiece with SPANNER (56).
CAUSE: JAW CASE REAR (6) too far forward.
REPAIR: See procedure under Section 2 above.
Ref. Q'ty Ref. Q'ty Ref. Q'ty
No. /Tool No. /Tool No. /Tool
95835 13 95851 1 39 9587 16
95897 14 95852 1 40 9587 17
95898 15 95853 1 41 9587 18
95899 16 95854 1 42 9587 19
95900 17 95780 1 43 9588 10
33 9587 10
8 95846 Case Washer Ring 1 34 9587 11
9 95847 1 35 9587 12
10 95848 2 36 9587 13
11 95849 1 37 9587 14
12 95850 1 38 9587 15
7B
Oil Piston Connector
95845
Jaw Pusher Spring
95844
O-Ring 69.6x5.7
5/32",1/8",3/32" Air Piston Lock Nut
Jaw Pusher Spring
Instructions and Parts List - #39058
10(x2), 11, 13, 17, 31, 34, 41, 43,
Service Kit Ref No.--
Back Up Ring Trigger
O-Ring 73x2.8
RK
Spanner Gauge
1/4",3/16"
7A
44, 45, 47, 49, 50
Case Lock Nut Cylinder Cap 4, 7, 14, 15, 16, 17
O-Ring 11.8x2.4 Connector
SK
95901
95902
Repair Kit Ref No.--
Air Piston Rubber Cushion
1
Air Piston Stem
Rubber Cushion
Jaw Case Rear Frame Lock Nut
Air Cylinder
Inlet Bushing
Spanner
Hydraulic Rod Guide Valve Cap
for 1/4",3/16" Frame Setting Pin Handle Pin
Jaw Pusher
1
Lever Pin Frame
for 3/32",1/8",5/32"
95842
Jaw Pusher
5A5B95841
Valve Spring
Jaws for 5/32",1/8",3/32" O-Ring O-Ring
Jaws for 1/4",3/16"
1
Back Up Ring
Frame Cap Nut O-Ring
for 3/32", 1/8", 5/32" O-Ring Steel Ball
Frame Cap O-Ring
for 1/4", 3/16" Safety Cap Valve
3
95838
Jaw Case Front
1
95837
Jaw Case Front
Valve Spring
Frame Head Hanging Clip O-Ring
Valve Pusher O-Ring
Nosepiece 5/32"(4.0mm) Return Spring (Small) Valve Pusher
Trigger Rod
Nosepiece 3/32"(2.4mm) Back Up Ring Trigger Lever
1
Nosepiece 1/4"(6.4mm)
1
O-Ring 23.7x3.5
Nosepiece 1/8"(3.2mm) Return Spring (Large)
Nosepiece 3/16"(4.8mm) Frame Cap O-Ring 27x2
M-4 AIR / HYDRAULIC RIVETER TOOL
Part No. Description Part No. Description Part No. Description
2 95836 1 18 95855 1 44 95881 1
19 95856 1 45 95882 1
20 95908 1 46 95883 1
21 95858 1 47 95884 1
22 95859 2 48 95885 1
4A 95839 23 95860 1 49 95886 1
4B 95840 24 95861 1 50 95887 1
25 95862 1 51 95888 1
26 95863 1 52 95889 1
27 95864 1 53 95890 1
28 95865 1 55 95891 1
6 95843 1 29 95866 1 56 95893 1
30 95867 1 57 95894 1
31 95868 1 58 95895 1
32 95869 1 59 95896 1
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