Nexen AIR CHAMP 5H20C User manual

(i)
TKF Conveyor Clutch
Model 5H20C
Product No. 911388
FORM NO. L-20227-A-0601

(ii)
In accordance with Nexen’s established policy of constant product improvement, the specifications contained in this
manual are subject to change without notice. Technical data listed in this manual are based on the latest information
available at the time of printing and are also subject to change without notice.
Technical Support:
800-843-7445
[phone]
www.nexengroup.com
Nexen Group, Inc.
560 Oak Grove Parkway
Vadnais Heights, Minnesota 55127
ISO 9001 Certified
Copyright 2000 Nexen Group, Inc.
Read this manual carefully before installation and operation.
Follow Nexen's instructions and integrate this unit into your system with care.
This unit should be installed, operated and maintained by qualified personnel ONLY.
Improper installation can damage your system or cause injury or death.
Comply with all applicable codes.
WARNING

(iii)
TABLE OF CONTENTS
Introduction---------------------------------------------------------------------------------------------------------------------------------------- 1
Installation ---------------------------------------------------------------------------------------------------------------------------------------- 1
Air Connections --------------------------------------------------------------------------------------------------------------------------------- 2
Lubrication----------------------------------------------------------------------------------------------------------------------------------------- 2
Troubleshooting---------------------------------------------------------------------------------------------------------------------------------- 3
Parts Replacement ----------------------------------------------------------------------------------------------------------------------------- 3
Replacement Parts ----------------------------------------------------------------------------------------------------------------------------- 6
Parts List ------------------------------------------------------------------------------------------------------------------------------------------- 7
Warranties ----------------------------------------------------------------------------------------------------------------------------------------- 8

1FORM NO. L-20227-A-0601
INTRODUCTION
Read this manual carefully, making full use of its explanations and instructions. The “Know How” of safe, continuous,
trouble-free operation depends on the degree of your understanding of the system and your willingness to keep all
components in proper operating condition. Pay particular attention to all NOTES, CAUTIONS, and WARNINGS to avoid
the risk of personal injury or property damage. It is important to understand that these NOTES, CAUTIONS, and
WARNINGS are not exhaustive. Nexen cannot possibly know or evaluate all conceivable methods in which service may
be performed, or the possible hazardous consequences of each method. Accordingly, anyone who uses a procedure
that is not recommended by Nexen must first satisfy themselves that neither their safety or the safety of the product will
be jeopardized by the service method selected.
The Model 5H20C Conveyor Clutch operates on static
air pressure. Torque is adjusted by simply varying the air
pressure. The Tooth Clutch design provides long life
without premature wear and slip as encountered with
wrap spring devices.
INSTALLATION
1. Slide Hub Collar (Item 6) onto Hub of Clutch, and
align hole in Hub Collar with hole in Hub of Clutch
(See Fig. 1.
2. Install customer supplied Key into shaft keyway (See
Fig. 1).
3. Slide Conveyor Clutch onto shaft (See Fig. 1).
4. Install and tighten Set Screw (Item 18) to 6 ft. lbs.
[8.5 N•m] torque (See Fig. 1).
FIGURE 1
Hub Collar
(Item 6)
Machine
Shaft
Customer
Supplied Key
Set Screw
(Item 18)
5H20C

2FORM NO. L-20227-A-0601
AIR CONNECTIONS
For quick response, a short air line between the control
valve and the Conveyor Clutch is recommended. Where
long air lines are required, a Quick Exhaust Valve should
be used to insure rapid disengagement.
Locate air inlet in the six o’clock down position to allow
condensation in the air chamber to drain out of the
exhaust port.
NOTE: Rigid pipe or tubing when connected directly to
the Conveyor Clutch will prevent proper
actuation due to the necessary movement of the
air chamber and hose upon engagement. Use
flexible hose or tubing only.
Due to bearing seal drag, the outer portion of the
Conveyor Clutch will rotate causing hose breakage
when the Conveyor Clutch is engaged. Resting the air
line against a support that is mounted parallel to the
Conveyor Clutch center line stops this rotation.
LUBRICATION
Pneumatically actuated devices require clean, pressure
regulated, and lubricated air for maximum performance
and long life. The most effective and economical way to
lubricate Nexen Clutches is with an air line lubricator,
which injects an oil mist into the air chamber.
Locate lubricator above and within ten feet of the Clutch,
and use a low viscosity oil, such as SAE-10.
NOTE: Synthetic lubricants are not recommended.
LUBRICATOR DRIP RATE SETTINGS
1. Determine CF(See Chart 1).
2. Multiply CFby 0.30, (the Average Air Chamber Volume
of the “5H20-P” Clutch) to determine cu.in./ Min..
3. Divide cu. in. / Min. by 1728 to find cu. ft. / Min.
(SCFM).
4. Multiply cu. ft. / min. (SCFM) by cycles per minute.
NOTE: Nexen recommends one drop of oil every 20
SCFM.
5. Divide twenty by the result of Step 4to determine
time in minutes between drops of oil formed in the
Lubricator Sight Gauge.
TABLE 1TABLE 1
TABLE 1TABLE 1
TABLE 1
0 102030405060708090100
P.S.I.
1
2
3
4
5
6
7
8
Cf
HUB SPLINE
Although the Hub Spline has been lubricated at the
factory with a high temperature lubricant such as
NEVER-SEEZ® or equivalent anti-seize lubricating
compound. Nexen recommends periodic lubrication of
this component to insure smooth clutch engagement
and disengagement
NOTE: Clutch must be disassembled in order to
lubricate Hub Spline (See REPLACEMENT
PARTS for disassembly instructions.

3FORM NO. L-20227-A-0601
FACE TEETH
Lubricate Drive Ring and Drive Flange face teeth with
NEVER-SEEZ® or equivalent whenever visual inspection
shows a need for lubrication.
BEARINGS
All bearings are pre-lubricated and sealed; therefore
lubrication of the bearings is not required.
TROUBLESHOOTING
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PARTS REPLACEMENT
CLUTCH REMOVAL
1. Shut off air supply to Clutch and remove Air Line
from Clutch.
2. Disengage Clutch from machine by removing chain
from sprocket.
3. Remove Set Screw (Item 18) (See Fig. 2).
4. Slide Clutch and Hub Collar (Item 6) off shaft of
machine (See Fig. 2).
5. Remove Hub Collar (Item 6) (See Fig. 2).
FIGURE 2
5H20C
Hub Collar
(Item 6)
Set Screw
(Item 18)

4FORM NO. L-20227-A-0601
BEARING REPLACEMENT (DRIVE SPROCKET)
1. Remove Retaining Ring (Item 17) (See Fig. 3).
Special attention should be exercised when
working with retaining rings. Always wear
safety goggles when working with spring or
tension loaded fasteners or devices.
2. Slide Cylinder/Piston Assembly off Hub (Item 1)
(See Fig. 3).
3. Remove Retaining Ring (Item 16) (See Fig. 4).
4. Press Hub (Item 1), and Bearings (Item 9) out of
Drive Sprocket (Item 3) (See Fig. 4).
5. Remove Retaining Ring (Item 17), and press Hub
(Item 1) out of Bearings (Item 9) (See Fig. 4).
6. Clean bore of Drive Sprocket with fresh safety
solvent.
7. Slide new Bearings (Item 9) onto Hub (Item 1) (See
Fig. 4).
8. Install Retaining Ring (Item 17) (See Fig. 4).
9. Apply Loctite®601 to O.D. of new Bearings (Item
9), then press Hub (Item 1), and Bearings into Drive
Sprocket (Item 3) (See Fig. 4).
NOTE: When installing new Bearings, carefully
align Bearing O.D. with bore of Drive
Sprocket to prevent Bearing misalignment.
Always support new Bearings when
pressing them into the Drive Sprocket.
10. Install Retaining Ring (Item 16) (See Fig. 4).
FIGURE 4
1
9
FIGURE 3
Drive
Sprocket
Cylinder/Piston
Assembly
Retaining Ring
(Item 17)
3
16
17

5FORM NO. L-20227-A-0601
1. Separate Cylinder (Item 5) and Piston (Item 4) (See
Fig. 5).
2. Press Drive Ring (Item 2) out of Cylinder (Item 5),
and Bearing (Item 9) (See Fig. 5).
3. Press Bearing (Item 9) out of Cylinder (Item 5) (See
Fig. 5).
4. Clean bore of Cylinder (item 5) with fresh safety
solvent.
5. Apply Loctite®601 to O.D. of new Bearing (Item 9),
and press Bearing into Cylinder.
NOTE: When installing new Bearings, carefully
align Bearing O.D., with bore of Cylinder or
Piston, to prevent Bearing misalignment.
Always support new Bearings when
pressing them into the Cylinder or Piston.
6. Slide Drive Ring (Item 2) into Bearing (Item 9), and
Cylinder (Item 5) (See Fig. 5).
7. Remove Retaining Ring (Item 10) (See Fig. 5).
Special attention should be exercised when
working with retaining rings. Always wear
safety goggles when working with spring or
tension loaded fasteners or devices.
BEARING REPLACEMENT (CYLINDER/PISTON ASSEMBLY)
FIGURE 5
2
9
5
8
10
8. Press Bearing (Item 8) out of Piston (Item 4) (See
Fig. 5).
9. Clean bore of Piston (Item 4) with fresh safety
solvent.
10. Apply Loctite®601 to O.D. of new Bearing (Item 8),
and press Bearing into Piston.
11. Install Retaining Ring (Item 10) (See Fig. 5).
O-RING & BACK-UP RING REPLACEMENT
1. Separate Cylinder (Item 5) and Piston (Item 4) (See
Fig. 6).
2. Remove O-rings (Items 13& 14) and Back-up Rings
(Items 12& 15) from Cylinder and Piston (See Fig. 6).
3. Clean O-ring grooves of Cylinder and Piston; then
lubricate new o-rings and o-ring grooves of Piston
and Cylinder with fresh O-ring lubricant.
FIGURE 6
Cylinder
Piston
12
13
14
15
4

6FORM NO. L-20227-A-0601
5H20C REASSEMBLY
1. Slide Drive Ring (Item 2) into Cylinder/Piston
Assembly (See Fig. 8).
2. Install Compression Springs (Item 20) into
respective holes of Drive Ring (Item 2) (See Fig. 8).
3. Lubricate splines of Hub (Item 1) with NEVER-SEEZ®.
4. Slide Cylinder/Piston Assembly onto Drive
Sprocket/Hub Assembly (See Fig. 9).
5. Install Retaining Ring (Item 17) (See Fig. 9).
Special attention should be exercised when
working with retaining rings. Always wear
safety goggles when working with spring or
tension loaded fasteners or devices.
REPLACEMENT PARTS
The item or balloon number for all Nexen products is used
for part identification on all product parts lists, product
price lists, unit assembly drawings, bills of materials, and
instruction manuals.
When ordering replacement parts, specify model
designation, item number, part description, and quantity.
Purchase replacement parts through your local Nexen
Distributor.
4. Install new O-rings (Items 13 & 14) and Back-up
Rings (Items 12 & 15) (See Fig. 6).
NOTE: When installing new O-rings and Back-up
Rings, make sure curved surface of Back-
up Ring matches surface of O-ring. Back-
up Rings must be installed on the non-
pressurized side of the O-rings (See Fig. 7).
5. Carefully slide Piston (Item 4) into Cylinder (Item 5),
to avoid damaging seals. FIGURE 7
13
12
15
14
FIGURE 8
FIGURE 9
20
8
Cylinder/Piston
Assembly
17
Drive Sprocket/Hub
Assembly
Cylinder/Piston
Assembly

7FORM NO. L-20227-A-0601
PARTS LIST
ITEM DESCRIPTION QTY.
1 Hub 1
2 Drive Ring 1
3 Sprocket 1
4 Piston 1
5 Cylinder 1
6 Hub Collar 1
7 Backing Plate 1
81Ball Bearing 1
91Ball Bearing 3
10 Retaining Ring (Int.) 2
11 Retaining Ring (Ext.) 1
121Back Up Seal (Large) 1
1Denotes Repair Kit Item / Repair Kit No. 911387
3
2
20
618 17
16 9
17
71
95
15 14 13
12
4
8
10
11
FIGURE 10
ITEM DESCRIPTION QTY.
131O-ring Seal (Large) 1
141O-ring Seal (Small) 1
151Back Up Seal (Small 1
16 Retaining Ring (Int) 1
17 Retaining Ring (Ext) 1
18 Set Screw 1
19 Key (Square) 1
201Compression Spring 3
22 Hose Assembly (Not Shown) 1