Troubleshooting
MHN Head Assembly
| MHNXX |
-XX |
-XX |
-XX |
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Identification Suffix |
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Blank = standard (no extension) |
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25 = 25mm extension |
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50 = 50mm extension |
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75 = 75mm extension |
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Larger number indicates amount of extension |
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Letters indicate special or altered unit |
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Component Number |
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00 = Standard Head |
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Nut Number |
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06 = M6 MHN Nut |
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08 = M8 MHN Nut |
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10 = M10 MHN Nut |
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12 = M12 MHN Nut |
| Head Type Identification |
| MHNA = Standard Head |
| MHNAE = Head with Error Proofing |
Die Buttons
| MHNB |
-XX |
-XXX |
-XX |
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Identification Suffix |
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Indicates special or altered unit |
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Nominal Panel Metal Thickness |
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Nut Number |
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06 |
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08 |
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10 |
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12 |
| Indicates Standard MHN Nut
Button |
Die Button Retainer
| HRAM-32 (M6, M8, M10) |
| HRAM-40 (M12) |
Power Feeder
| MPF |
-XX |
-X |
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00 Indicates Assembly |
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Nut THD in millimeters |
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MHN06 |
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MHN08 |
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MHN10 |
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MHN12 |
| Pierce Nut Feeder |
Registry Marker
MSM-26-30 Use for all nut sizes
Electrical Prox Probe Requirements
| FCP-8D-PNP Nut Detection Panel |
| MSE-84 Die Wiring Kit |
Plastic Nut Guide
| MHN |
-XX |
-12 x 15' |
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00 Indicates Assembly |
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Nut Number |
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06 = M6 MHN Nut |
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08 = M8 MHN Nut |
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10 = M10 MHN Nut |
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12 = M12 MHN Nut |
| Nose Sub-Assembly |
| Detail No. |
Description |
Part No. |
No. Req'd |
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| 1 |
Nose Assy |
MHN-XX-01-XX |
1 |
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| 1.1 |
Nose Body |
MHN-XX-01N-XX |
1 |
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| 1.2 |
Segment 1 |
MHN-XX-01S1-XX |
1 |
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| 1.3 |
Segment 2 |
MHN-XX-01S2-XX |
1 |
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| 1.4 |
Segment 3 |
MHN-XX-01S3-XX |
1 |
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| 1.5 |
Segment 4 |
MHN-XX-01S4-XX |
1 |
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| 1.6 |
Guide Insert |
MHN-XX-01G |
1 |
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| 1.7 |
Urethane Round Rod |
130648 |
8 |
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| 1.8 |
Flat Head Screw |
502095 |
1 |
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| Base Nose Sub-Assembly |
| Detail No. |
Description |
Part No. |
No. Req'd |
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| 2 |
Shank |
MHN-XX-02-XX |
1 |
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| 3 |
Base |
MHN-COM-03 |
1 |
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| 3.1 |
Sleeve Bearing |
MHN-MS-144 |
1 |
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| 4 |
Backup Plate |
MHN-COM-04 |
1 |
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| 5 |
Plunger |
MHN-XX-05-XX |
1 |
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| 6 |
Finger |
MHN-XX-0a6 |
2 |
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| 7 |
Proximity Probe |
MSE-7APNP-CA |
1 |
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| 9 |
Cover |
MHN-XX-09 |
2 |
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| 10 |
Guide Pin |
MHN-XX-10 |
2 |
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| 11 |
Guide Plate |
MHN-XX-11 |
1 |
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| 12 |
Plastic Chuting |
MHN-XX-12 |
1 |
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| 13 |
Probe Retaining Plate |
MHN-XX-13 |
1 |
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| 14 |
M5 x 0.8P x 12 lg SHCS |
500221 |
4 |
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| 15 |
Lever Arm |
MHN-COM-15 |
1 |
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| 16 |
Shank Spring |
MS-1-XXX |
1 |
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| 17 |
Shank Stop Pin |
MHN-MS-3 |
1 |
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| 18 |
Stop Pin Retaining Plate |
MHN-MS-4 |
1 |
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| 19 |
Retaining Bolt |
MHN-MS-5 |
1 |
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| 20 |
NPT Plug (1/8") |
MS-20 |
1 |
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| 21 |
3mm )D x 16 mm lg Dowel |
MS-109 |
1 |
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| 22 |
M10 x 1.0P x 35 lg SHCS |
500222 |
2 |
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| 23 |
6 mm OD x 20m lg Dowel |
501922 |
1 |
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| 24 |
M4 x 0.7P x 10 lg FHS |
502100 |
6 |
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| 25 |
M6 x 1.0P x 12 SHCS-Low hd |
502577 |
4 |
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| 26 |
Spring Ring |
502950 |
4 |
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| 27 |
Finger Spring |
503186 |
2 |
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| 28 |
10 mm OD x 20 mm lg Dowel |
Supplied by Customer |
2 |
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| 29 |
M10 x 1.5P x 40 lg SHCS |
Supplied by Customer |
3 |
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| Chute Attaching Block
Sub-Assembly |
| Detail No. |
Description |
Part No. |
No. Req'd. |
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| 8 |
Chute Attaching Assy |
MHN-XX-08 |
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| 8.1 |
Chute Attaching Block |
MHN-XX-08B |
1 |
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| 8.2 |
Cover Plate |
MHN-XX-08C |
1 |
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| 8.3 |
M6 x 1.0P x 16 SHCS |
500905 |
2 |
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XX - denotes nut number and extension
length |
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| In-Line Power Feeder |
| Detail No. |
Description |
Part No. |
No. Req'd. |
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| 01 |
Feed Block |
MPF-MHNXX-01-PP |
1 |
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| 02 |
Top Plate |
MPF-250-02-PP |
1 |
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| 03 |
Air Cylinder (1-1/2 bore) |
MPF-AIR-PP |
1 |
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| 04 |
Cover Plate |
MPF-MHNXX-04-PP |
2 |
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| 05 |
Slide Track |
MPF-250-B-05 |
1 |
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| 06 |
Clevis |
MPF-COM-06 |
1 |
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| 07 |
Nut Pawl Spring |
CS-3 |
1 |
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| 08 |
Nut Pawl |
MPF-COM-31 |
1 |
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| 09 |
Side Mounting Plate |
MPF-250-09 |
1 |
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| 10 |
Cover Plate Screws
(1/4-20 x 5/8" socket head cap screw) |
MS-17 |
3 |
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| 11 |
Cover Plate Screws
(1/4-20 x 1/2" socket head cap screw; low head) |
500021 |
8 |
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| 12 |
Chuting |
MHN-XX-12 |
2 |
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| 13 |
Clevis Set Screw (#10-32 x
3/16") |
CS-10 |
1 |
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| 14 |
Clevis Dowel
(1/4 O.D. x 3/4" long) |
CS-15 |
1 |
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| 15 |
Slide Track Screws
(1/4-20 x 2-3/4" socket head cap screw) |
MS-156 |
4 |
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| 16 |
Slide Track Dowel
(1/4 O.D. x 1-3/8" long) |
500300 |
2 |
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| 17 |
Screw (1/4-20 x 7/8") |
500209 |
4 |
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| 18 |
Roll Pin (5/16 O.D. x 2" long) |
MS-158 |
1 |
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| 19 |
???? Screw (5/16-18 x 1.75"
long) |
??? |
2?? |
Assembly/Disassembly
 The MHN Round Pierce Nut Installation Heads may be easily
repaired using the following procedures. Most repairs can be
accomplished without removing the Head from the die or fixture,
keeping ‘downtime’ to a minimum..
Chute Attaching Block - Removing or Installing Chute Attaching
Block
Removal:
- Depress lever arm (J) to disengage lock pin. Pull Chute
Attaching Block (A) from head.
Installation:
- Insert Chute Attaching Block (A). Make certain lock pin
engages when Chute Attaching Block is inserted.
- Remove device used to block Nut flow from hole (J) in Chute
Attaching Block.
Nose Assembly - Removing or Installing Nose Body Assembly
Removal:
- Remove Chute Attaching block (A), as described previously.
- Support nose (Q) and remove two shank screws (P).
- Slide Nose/Assembly down off plunger (D).
Installation:
- Position Nose/Assembly on plunger and install two shank
screws (P).
- Install Chute Attaching Block (A), as described previously.
Nose and Shank Assemblies - Removing or Installing Nose and Shank
Assemblies
Removal
- Remove Chute Attaching Block (A), as described previously.
- Remove screws (C) and pin plate (F) from base.
- Use a pry bar and apply force on Shank to relieve spring
pressure on Shank stop pin (E) and remove pin. Slowly release
spring pressure.
- Remove Nose (Q) and Shank (K).
Installation
- Position Shank (K) and Nose (Q) in Head.
- Use a pry bar and apply force to Shank to compress Shank
spring and install Shank stop pin (E) so that pin enters slot in
Shank.
- Install stop pin plate and tighten plate screw (C).
- Install Chute Attaching Block (A), as previously described.
Head Assembly - Removing or Installing Head Assembly
Removal:
- Remove Chute Attaching Block (A),as described previously.
- Remove screws (C) and pin plate (F)from base.
- Use a pry bar and apply force on Shank to relieve spring
pressure on Shank stop pin (E)and remove pin. Slowly release
spring pressure.
- Remove socket head screws (S).Tap base with a soft hammer
and pry loose from the die shoe dowel pins.
Installation
- Position Base Assembly on dowel pins in die shoe and install
socket head screws (S).
- Use a pry bar and apply force to Shank to compress Shank
spring and install Shank stop pin (E) so that pin enters slot in
Shank.
- Install stop pin plate (F) and tighten plate screw (C).
- Install Chute Attaching Block (A), as described previously.
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