Maxmotosports Electric PTO Clutch Installation Instructions

Checking

Step 1--Engine shaft size

Most of the time, PTO clutches are mounted directly onthe engine shaft. If the installtion is not on an engine shaft, please make sure that the tolerances are close enough to provide a snug fit between the bore of our clutch and theshaft.

Step 2--Direction of rotation

We manufacture our units for either clockwise orcounter-clockwise rotation. They can be mounted with the pulley toward the engine or theycan be mounted with the pulley away from the engine.

Step 3--Backing plate restraint

If the installation uses a pin or a flat going through the slot on the backing plate, approximately 1/16" of movement should be allowed in boththe radial and axial direction. Various other options are also acceptable such as a plate contacting one of the flats of the backing plate as well as clevis pins or cables.

Step 4--Key length and height

In many of the clutches, the key does not go all theway through the clutch. Therefore, the key length can only be as long as the keyway lengthwithin the rotor. Please check this before installation. In some clutches, the bearing inner race may be exposed on the top of the keyway. In this case, the key needs to be slightly undersized in this area so it does not force itself against the bearing inner race.

Preparation

Step 1--Inspect Electrical Circuit

With the PTO switch in the on position the voltageshould be between 13.4 and 14V DC. If the voltage was different there is a problem with the mower's electrical system. PTO ON = Voltage is 13.4 V DC minimum, PTO OFF = Voltage is 0.0VDC.

Step 2-- Remove Tie Wraps and Inspect the Wire Harness

 Remove the wireharness connectors. Look for pinching, chaffing, fraying or tears. Check the entire wire harness for damage.

Step 3-- Remove the Belt

Release the belt tensioner located on the mower deck. Inspect pulley bearings, spindle bearings and the belt for damage.

Step 4-- Take Note of Component Locations

It is important to know how the componentsare assembled. It is critical that everything goes back together correctly.

Step 5-- Take Note of Clutch Orientation

We offer CCW type clutch & CW type clutch. CCW=counter clockwise pulley away from the engine, CW=clockwise pulley away from the engine.

Step 6-- Remove the Clutch

Remove the clutch bolt. An impact wrench will workgreat for this task. If you do not have an impact wrench you will need to hold the D-Spacer to prevent the engine crankshaft from turning. (Not all models use D-Spacer.)

Step 7-- Inspect and Clean Crankshaft

Remove any rust or contamination on the crankshaft. Inspect the crankshaft keyway for damage. Remove any burrs with a file

Maxmotosports Electric PTO Clutch Installation

Step 1-- Install the Drive Pulley and Spacer

Use notes from the removal process & slide clutch onto the crankshaft. It is a little tricky to get key and keyway alignment. Do not strike!

Step 2-- Install the New Clutch

Line up the crankshaft keyway to the clutch key andStriking the clutch onto the crankshaft will cause damage.clean and dry. If a new bolt is used, use the chart below to make sure it is correct type.

Step 3-- Install the Clutch Bolt

Strong recommend using a new bolt. The bolt must be clean and dry. If a new bolt is used, use the chart below to make sure it is correct type.

Step 4-- Torque Clutch Bolt

 It is important to use a torque wrench for this task. Hold the D-Spacer with a wrench to prevent crankshaft turning. Proper torque is critical to the life ofthe clutch. There is no need over tighten! Failure to torque to the requirements below will degrade clamping forces and can allow the clutch to separate from the crankshaft. This cancause risk of serious personal injury. Impact wrenches can cause bearing damage.

Step 5--Install the Deck Belt

Install belt and tension. Make sure the belt is on every pulley.

Step 6--Inspect the Clutch Anti Rotation Device

It is very important that the clutch isfree to move up and down and a little side to side. Use only the original anti rotation device. All mowers have anti rotation devices. The clutch will be damage if the anti-rotation does not allow for movement.

Step 7-- Connect the Clutch Wire and Secure with Tie Wraps

When attaching tiewraps make sure to leave some slack for the natural movement of the clutch. Secure tie wrapstightly and trim. Make sure the wire routing does not allow for chaffing or rubbing on any movingparts.

Step 8-- Torque the Mower Blades

Use new clutch has very strong blade brakes. Improper blade torque or damaged blade hardware can lead to blade loosening and can causerisk of serious personal injury.

Burnish the Clutch: Reduce engine RPM's to % and engage clutch. Allow the blades to reach fullspeed ( a few seconds ). Disengage blades and allow them to completely stop. Repeat 10 times. Shut the engine off and check the blade and clutch bolt torque. This is the important final step. If the clutch is not burnished it may warp and shorten the life.