Photo courtesy The secondary clutch connects to the track drive, which turns the wheels and powers the tracks. This system consists of two pulleys, or clutches, connected by a drive belt. Excessive fuel consumption Poor acceleration Clogged or loose main jet. Clogged or loose pilot jet Remove the pilot jet, clean it with compressed air and then install it. Email your questions or suggestions to. The now-common reverse helix design was brought to the world by John Deere for the 1976 model year.
Poor performance at Starter valve is left open Return the starter lever to its seated position High speeds: Power loss Poor acceleration Clogged air vent Remove and clean the air vent. Poor performance at Clogged air vent Remove the air vent hose and clean it. If you service clutches often, you can find nicer tools for holding them. The basic flyweight-style drive clutch dates back to the early 1970s. Make sure that the pilot jet is fully tightened. But at the time, a driven clutch that backshifted or downshifted quickly was a significant upgrade in state-of-the-art clutching. Low fuel pump performance Repair or replace the fuel pump.
The piston is damaged or seized. This clutch has several holes to allow for some preload adjustment and fine tuning of spring tension. Clogged or loose main air jet Remove the main jet, clean it with compressed air, and then install it. It needs to be heated too. Every Clymer snowmobile service manual contains hundreds of original photographs and illustrations obtained from the complete disassembly and assembly of the snowmobile covered. Do you have low speed acceleration or bog issues on your snowmobile? Snowmobile clutches have a difficult life.
It compensates for the initial wear that occurs during the life of the snowmobile. Looks like aftermarket weights, wondering if the nut on that roller bolt is not tight enough causing it to fall out? Excessive use of the starter or choke Return the starter lever to its seated position so that the starter valve is fully closed. Use a proper holder to allow the retaining bolt to be removed or installed, and then make sure to put a dab of grease on the end of the puller bolt and threads to ease use. A compound or multi-angle helix can tune around those characteristics for fast acceleration and a quick backshift. An automobile engine sends power through a driveshaft, which directly rotates the axle and the wheels of the car.
Air leaks into the fuel line Tighten or replace the fuel line joint. To help the belt grip and perform better on the clutches, take a scotch-brite pad and rub it on the surface of the clutch to smooth out any minor wear marks and give it a grip happy finish. The service manual downloads for the above listed brands describes the service procedures for the complete snowmobile vehicle. There are guys on this site that have whole clutches they may be willing to part with. Perform this on both the primary and secondary clutch surfaces.
Overflow Check and, if necessary, clean the float and float valve. In some cases you may here a clunking noise when coming to a stop as a sticking clutch sheave pops back to idle position. It seems all the failures the clutch has been apart at some point. Check the cooling system, gasoline octane rating and ignition timing. Poor acceleration Slow response to res onse throttle. Abnormal combustion: Lean mixture Clean and adjust the carburetors. Mine did this at 7400 miles, but i had taken those bolts off at least 4 times so i decided to just eat the whole cost feeling as though i should have replaced those nuts.
A pressure spring holds the primary's two halves apart when the engine rpm is low. Use when replacing parts for factory performance and fit. Once everything looks shiny and clean, put everything back together. Dirty or clogged fuel line Clean or replace the fuel line. Using improper tools may actually cause damage. The secondary clutch is a load-sensing unit that primarily controls shift-out and backshifts. Since a snowmobile clutch is right next to the engine, the clutch surfaces and belt get a build up of grime caused by oil mist, exhaust gases, belt wear, and water.
Use the spring compressor when putting the secondary clutch back together. Check the piston for holes or seizure. This, in addition to extensive research, is how Clymer repair manuals achieve an unmatched level of detail, accuracy and clarity to guide the reader through each service, troubleshooting and repair procedure. Do you have a tech question you want answered? Because I know a machine is only as strong as its weakest component. Tightening the Cover: The cordless impact makes short work of tightening the six cover bolts, completing the clutch job. Once everything is back on and together go out and enjoy your happier responsive sled! Certain procedures require the use of special tools that are not available to the general public and your dealer will have to perform these procedures for you as necessary. Make sure that the pilot jet is fully tightened.