Table of Contents

General Information

The AUTO Mfg. Inc. clutch and PTO is a spring-loaded automotive style clutch assembly capable of providing full engine horsepower from the PTO output shaft. Designed for use on both gasoline and diesel engines, the main components for each engine are the same.

Two models of the clutch and PTO are available:

HD1300

The HD1300 provides a 1 ¾” output shaft for use on gasoline and diesel engines. This assembly incorporates 3 heavy-duty ball bearings (1 at the front and 2 at the rear of the housing), 1 3/¬8” splined shaft, with hardened spline and bearing journals.

The 13” clutch disc with 1 3/¬8” splined hub and ceramic metallic pads is designed for medium to heavy-duty industrial applications up to 120hp.

The industrial style pressure plate incorporates 12 springs providing a clamping force of 1860 lbs.

HD1300XT

The HD1300XT provides a 2 ¼” output shaft with hardened spline and journals for use on diesel engines up to 150hp. The assembly utilizes 2 heavy-duty roller bearings 1 each at the front and rear of the PTO housing.

The 13” clutch disc with 1 ½” splined hub and ceramic metallic pads is designed for heavy-duty industrial applications up to 150 hp.

The Industrial style pressure plate incorporates 16 springs providing a clamping force of 2425 lbs.

The PTO output shaft in both models is centered into a pilot bearing located in the engine flywheel.

The PTO and clutch assemblies are designed for use on either in-line or belt driven applications. A drive shaft utilizing universal joints must be used with in-line installations to compensate for engine and driven unit mal-alignment.

Clutch Operation

WARNING:

ROTATING SHAFTS, PULLEYS, AND MOVING BELTS CAN CAUSE SEVERE INJURY OR CAN BE FATAL.

THE ENGINE AND DRIVEN UNIT MUST BE COMPLETELY STOPPED BEFORE ANY ADJUSTMENTS OR WORK IS ATTEMPTED TO THE ENGINE, DRIVEN UNIT, OR THE PTO CLUTCH ITSELF.

Operation of the AUTO Clutch is very simple.

FIG. 1

The AUTO clutch is disengaged with the handle in the ‘down’ or ‘horizontal’ position. It is recommended that the engine be started with the clutch disengaged.

If the engine is being started for the first time during the workday, allow the engine to WARM UP for a few minutes before engaging the clutch.

FIG. 2

For mechanical throttle actuated engines, increase the engine rpm to approximately 1000 to 1200 rpm. Engage the clutch by moving the clutch handle to the ‘up’ or ‘vertical’ position slowly enough to prevent stalling the engine

For electronic throttle controlled engines, engage the clutch with the throttle control in the slow idle position. Use caution when engaging the clutch, not to allow excessive slippage of the disc prior to full engagement.

CAUTION:

Excessive slippage during engagement will cause premature failure of the clutch disc. This type of failure is not covered under the clutch warranty.

When the driven equipment is running at the same rpm as the engine allow the clutch to engage fully.

With the clutch handle in the vertical position and the clutch fully engaged, you can now move the engine throttle to the preferred engine operating position. The PTO output shaft is now rotating at engine rpm.

CAUTION:

Engaging the clutch at maximum engine RPM will cause the disc and pressure plate to overheat and result in premature failure of the disc pads (disintegration) and pressure plate. This type of failure is not covered under the clutch warranty.

Clutch Adjustment

A properly adjusted clutch will provide many hours of service life. Therefore it is important that the adjustment of the clutch linkage be checked after the first 15 hours of operation and every 250 hours thereafter.

An improperly adjusted clutch can result in premature wear to the clutch disc, pressure plate, throw-out bearing, and engine flywheel.

1. With the clutch handle in the engaged position, adjust the nut against the ‘rocker ball’ until a 1/8” gap is obtained between the nut and the ‘rocker ball’.

2. Use the 1/8” gauge tool (41500103) to slip between the nut and the rocker ball with a slight amount of pressure.

3. Tighten the lock nut to the adjusting nut.

4. Place the handle in the disengaged position (horizontal). Check to make sure that the PTO output shaft turns freely.

Clutch Adjustment (HD1300xt)

1. With the clutch handle in the engaged position, adjust the nut against the ‘rocker ball’ until a 1/8” gap is obtained between the nut and the ‘rocker ball’

2. Use the 1/8” gauge tool (41500103) to slip between the nut and the rocker ball with a slight amount of pressure.

3. Tighten the lock nut to the adjusting nut.

4. Place the handle in the disengaged position (horizontal). Check to make sure that the PTO output shaft turns freely.

Lubrication

The PTO assembly on both the HD 1300 and HD1300XT are equipped with sealed for life bearings. No greasing of the PTO assembly is required.

The clutch lever crossover shaft should be lubricated with a high temperature lithium base #2 lubricant at 250-hour intervals.

The bore of the throw-out bearing must be lubricated with a moly-based grease if disassembled for service reasons.

Service Parts HD1300, 1 ¾” Shaft PTO Assembly

Shaft PTO Assembly

Ref. No.Part NumberQty.Description
1450000308Bolt, 5/16-18x1”, Grade 5
2415000571Cover. Bearing Retainer
3415001901Key
4415001951Shaft, PTO
5415001253Bearing, PTO
6450001772Bolt, 9/16-12x1¾”, Grade 5
7450001034Lock Washer, 9x16”
8415001881Housing, PTO
10415001541Ring, Snap 1 11/16”
11415001981Housing, Support Throw-out Bearing
415001941Assembly, PTO Shaft & Housing (Includes 1,2,3,4,5,8,10 & 11)

Service Parts HD1300 Lever Ass. And Linkage (HD1300 1 ¾”Shaft)

Ref. No.Part NumberQty.Description
1415000631Fork
Not Shown415001741Retainer, Clutch Fork
2415000891Linkage, Lever (Diesel)
415000181Linkage, Lever (GM)
3415001661Bracket, Linkage (Diesel)
415000151Bracket, Linkage (GM)
4415000671Rod, Linkage (Diesel)
415000651Rod, Linkage (GM)
5415000661Rod, Linkage (Diesel)
415001001Rod, linkage (GM)
6415000193Rod End
7415001011Shaft, Lever
841500042
41500111
1Housing, Shaft (GM)
Housing, Shaft (Diesel)
9415000431Zerk, Grease
10415000441Handle
11415000452Bushing, Shaft
12415000462Collar
13415000301Ball, Rocker
14450000508Nut, 3/8-24
15415000011Ball, Pivot (Diesel)
415000641Ball, Pivot (GM)
16450001771Bolt, 3/8-16x1” Grade 5
17450000634Lock Washer, 3/8”
18450000641Flat Washer, 3/8”
19450000121Bolt, ¼-28x2”
20450000151Lock Nut, ¼-28
21450000511Lock nut, 3/8-16
22415001751Boot
23415000401Tool, Alignment
24415001031Tool, Adjustment

Service Parts HD1300 Clutch And Housing

Ref. No.Part NumberQty.Description
141500059
(41500218)
1Pilot Bearing (Perkins, Cummins)
41500007
(41500217)
1Pilot Bearing (John Deere)
2415001491Disc, Clutch
3415000601Plate, Clutch Pressure
4415000031Bearing, Throw Out
5415001721Housing, Adapter
6450002248Bolt, 3/8”-24x1” Grade 5 (Perkins, Cummins)
450000548Bolt, 3/8”-16x1” Grade 5 (John Deere)
7450000638Lock Washer, 3/8”
84500004310Bolt, M10-1.5x30mm
450000032Bolt, M10-1.5x45mm (John Deere)
450002262Bolt, M10-1.5x35mm (Perkins)
94500004612Lock Waster, M10
10415000091Decal, Diesel Clutch

Service Parts HD1300 PTO Assy. 2 ¼ “ Shaft

Ref. No.Part NumberQty.Description
1450000308Bolt, 5/16-18x1”, Grade 5
2415001231Cover, Bearing
3415001971Shaft, PTO
4415001261Key
5415001253Bearing, PTO
6450001052Bolt, 9/16-12x3, Grade 5
7450001772Bolt, 9/16-12x1¾”, Grade 5
8450001034Lock Washer, 9/16”
9415001881Housing, PTO
10415001541Ring, Snap 1 11/16
11415001981Housing, Support, Throw-out Bearing
415001961Assembly, PTO Shaft & Housing (Includes 1,2,3,4,5,9,10,11)

Service Parts HD1300 Lever Assy. And Linkage (HD1300 PTO Assy. 2 1/”4 Shaft)

Ref. No.Part NumberQty.Description
1415000631Fork
Not Shown415001741Retainer, Clutch Fork
2415000891Linkage, Lever (Diesel)
415000181Linkage, Lever (GM)
3415001661Bracket, Linkage (Diesel)
415000151Bracket, Linkage (GM)
4415000671Rod, Linkage (Diesel)
415000651Rod, Linkage (GM)
5415000661Rod, Linkage (Diesel)
415001001Rod, Linkage (GM)
6415000193Rod End
7415001011Shaft, Lever
841500042
41500111
1
1
Housing, Shaft (GM)
Housing, Shaft (Diesel)
9415000431Zerk, Grease
10415000441Handle
11415000452Bushing, Shaft
12415000462Collar
13415000301Ball, Rocker
14450000508Nut, 3/8-24
15415000011Ball, Pivot (Diesel)
415000641Ball, Pivot (GM)
16450001771Bolt, 3/8-16x1” Grade 5
17450000634Lock Washer, 3/8”
18450000641Flat Washer, 3/8”
19450000121Bolt, ¼-28
20450000151Lock Nut, ¼-28
21450000511Lock Nut, 3/8-16
22415001751Boot
23415000401Tool, Alignment
24415001031Tool, Adjustment

Service Parts HD1300 Clutch And Housing Assy. (HD1300 PTO Assy. 2 ¼” Shaft)

Ref. No.Part NumberQty.Description
141500059
(41500218)
1Pilot Bearing (Perkins, Cummins)
41500007
(41500217)
1Pilot Bearing (John Deere)
2415001491Disc, Clutch
3415000601Plate, Clutch Pressure
4415000031Bearing, Throw Out
5415001721Housing, Adapter
6450002248Bolt, 3/8” – 24x1” Grade 5 (Perkins, Cummins)
450000548Bolt, 3/8” – 16x1” Grade 5 (John Deere)
7450000638Lock Washer, 3/8”
84500004310Bolt, M10-1.5x30mm
450000032Bolt, M10-1.5x45mm (John Deere)
450002262Bolt, M10-1.5x35mm (Perkins)
94500004612Lock Washer, M10
10415000091Decal, Diesel Clutch

Service Parts HD130xt PTO Assy. 2 ¼” Shaft

Ref. No.Part NumberQty.Description
14500021212Bolt, 5/16-18x1 ¼” Grade 5
2415002051Cover, Rear
3415002061Bearing, Rear
4415001261Key
5415002031Shaft, PTO
6450001042Bolt, 9/16-12x1 ½”
7450001052Bolt, 9/16-12x3”
8450001034Washer, Lock 9/16”
9415002041Housing, PTO
10415002021Housing, Support
11415002071Bearing, Front
415002001Assembly, PTO Shaft & Housing (Includes 1,2,3,4,5,9,10,11)

Service Parts HD1300xt Lever Assy. And Linkage

Ref. No.Part NumberQty.Description
1415000631Fork
Not Shown415001741Retainer, Clutch Fork
2415000951Linkage, Lever (Diesel)
3415001661Bracket, Linkage (Diesel)
4415000651Rod, Linkage
5415000661Rod, Linkage (Diesel)
6415000193Rod End
7,8,11,12415000961Shaft, Lever & Housing, Assy
9415000431Zerk, Grease
104155000441Handle
13415000301Ball, Rocker
14450000507Nut, 3/8-16x1” Grade 5
15415000011Ball, Pivot (Diesel)
16450001771Bolt, 3/8-16x1” Grade 5
17450000636Lock Washer, 3/8”
18450000641Flat Washer, 3/8”
19450000121Bolt, ¼-28x2” Grade 5
20450000151Lock Nut, ¼-28
21450000511Lock Nut, 3/8-16
22415001751Boot
23415001641Tool, Alignment
24415001031Tool, Adjustment

Service Parts HD1300xt Clutch And Housing

Ref. No.Part NumberQty.Description
141500059
(41500218)
1Pilot Bearing (Perkins, Cummins)
41500007
(41500217)
1Pilot Bearing (John Deere)
2415002081Disc, Clutch
3415002091Plate, Clutch Pressure
4415000031Bearing, throw Out
5415001721Housing, Adapter
6450002248Bolt, 3/8”-24x1” Grade 5 (Perkins, Cummins)
450000548Bolt, 3/8”-16x1” Grade 5 (John Deere)
7450000638Lock Washer, 3/8”
84500004310Bolt, M10-1.5x30mm
450000032Bolt, M10-1.5x45mm (John Deere)
450002262Bolt, M10-1.5x35mm (Perkins)
94500004612Lock Washer, M10
10415000091Decal, Diesel Clutch

Auto Clutch PTO
Two-Year Warranty Statement

AUTO Mfg. Inc. warranties the PTO assembly of which it controls the design and fabrication of to be free from defects in materials and workmanship for a period of two years from the date of sale to the original retail purchaser. This warranty is valid provided AUTO Mfg. Inc. is notified of the alleged defect within 10 days of its discovery.

If proven to our satisfaction that the product is defective as to material and workmanship, the necessary parts will be replaced and/or repaired by AUTO Mfg. Inc. Before starting repair on the PTO assembly, the owner or the service dealer must discuss the repair with AUTO Mfg. Inc. Once it is determined that a possible warranty failure has occurred, the Product Support Manager and the owner or servicing dealer must discuss the method and cost of repair. Replacement components will require the owner or the servicing dealer to purchase replacement parts from AUTO Mfg. Inc. The component or part in question must be returned to AUTO Mfg. Inc. via freight prepaid to be considered for warranty credit. AUTO Mfg. Inc. obligation under this warranty is limited to repair or replacement of AUTO Clutch products or parts only and does not obligate AUTO Mfg. Inc. to bear any other cost including economic loss, consequential, incidental or punitive damages. The sole and exclusive remedy under this warranty shall be the cost of repair or in the discretion of AUTO Mfg. Inc., the replacement of the defective item or items. Maximum allowable labor is 4 hours at $50.00 per hour. No travel time will be considered.

Items manufactured by other suppliers and used by AUTO Mfg. Inc. to complete the packaged product are warranted, if at all only by the respective manufacturer. These items typically include, but are not limited to, pressure plate, clutch disc, throw out bearing, etc. If the owner or servicing dealer is of the opinion that a component should be considered for warranty, AUTO Mfg. Inc. Product Support will assist in presenting a warranty claim to the responsible manufacturer. Replacement of any of these components will require the owner or the servicing dealer to purchase the replacement part from AUTO Mfg. Inc. The component in question must then be returned to AUTO Mfg. Inc. via freight prepaid. The suspect component will then be reviewed by AUTO Mfg. Inc. with the responsible supplier for possible warranty credit. If credit is obtained, a cash credit for the part only will be issued to an owner or a credit memo will be issued to a servicing dealer. The sole and exclusive remedy under this warranty will be the cost of the replacement part only. No labor or travel time will be considered.

Clutch disc, clutch pressure plate, and engine flywheel will not be considered for warranty when failure is due in the judgment of AUTO Mfg. Inc. to premature wear out or damage caused by slippage or operator abuse or mis-adjustment.

THIS WARRANTY WILL APPLY ONLY IF THE FAILURE IS DETERMINED TO BE A MANUFACTURING DEFECT, AND NOT CAUSED BY MIS-USE, MIS-ADJUSTMENT, SLIPPAGE, OR OPERATOR ABUSE.

UNDER NO CIRCUMSTANCES WILL auto Mfg. Inc. or any servicing dealer be liable for incidental or consequential damages or injuries including, but not limited to, loss of profits, rental of substitute equipment, or other commercial loss, damage of equipment in which the clutch is installed or for damages suffered by a purchaser as a result of fundamental breaches of contract or breaches of fundamental terms. The remedies set forth in this warranty are the purchaser’s exclusive remedies in connection with the performance of, or any breach of guaranty, condition, or warranty in respect of AUTO Mfg. Inc. clutches.

AUTO Mfg. Inc. reserves the right to improve the product through changes in design or materials without being obligated to incorporate such changes in products of prior manufacturer. The customer will not use any such changes as evidence of insufficiency or inadequacy of prior designs or materials.

THE WARRANTY IN THIS STATEMENT BY AUTO MFG. INC. IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED.

AUTOCLUTCHWARRANTY01312005