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Posted on Jan 02, 2017
SOURCE: Belt tracking
Take the end caps and motor shroud off visually inspect the frame tension bolts to see if anything is bent. then loosen, ( count how rotation it took to loosen the so when tighten the belt up you won't have to guest at the tension ) the belt and edges of the belt to see if the weave is uneven this cause the belt to travel. If you can tip the treadmill on its side to inspect underneath to see if anything skewed. Take your time and observe the mechanical operation you may have the above a 1/2 a dozen time before you see the problem, other than that anything short of replacing the belt this my recommendation. Good Luck to you
Posted on Jun 15, 2010
SOURCE: Describe your proform 765 ekg
The problem you have is one of two things. 1 you have a loose walk belt, or 2 you have a spun front drive pully.
You need to remove the front cover to be able to observe the drive belt as it is turning on the drive pully( on the LH side of the front roller) try to stop the walk belt while traveling at speed setting 3. Hang on to the side handles, if the drive belt runs as normal, watch the front roller it will be slipping. If this happens you will need to replace the front roller.
Posted on Nov 05, 2010
check the tention on the w/belt.after that check the drive motor belt if you find lots of black powder your belt is worn out. it dose not have the grip to move the front roller
Posted on Feb 28, 2011
See the videos:
Posted on Nov 08, 2011
SOURCE: I have norditrack c1900 series
Watch this videos:
Posted on Nov 09, 2011
Tips for a great answer:
Belt tension is very important, as a belt that is too tight will put too much stress on the bearings of the components it drives, causing them to wear out prematurely. A belt that is too loose will slip, causing (1) the belt to wear out quickly due to friction heat, and (2) inefficient alternator, air pump, cooling fan or air conditioner operation because much of the turning power supplied by the main drive pulley is lost.
The belts should be inspected and/or adjusted at 2,000 miles (3,221 km) and then every 4,000 miles (6,441 km). First, make sure that the belt is properly positioned in the pulley. Check the pulleys for damage. Inspect the belts for cracks and signs of fraying. These usually develop on the inner surface and extend into the backing or outer surface of the belt. Check also for glazing, a completely smooth appearance which indicates slippage. A belt that is in good shape will have a slightly grainy appearance like cloth. Replace belts that show cracks or glazing.
Check belt tension. Apply pressure with your thumb at the mid-point between two pulleys, and the belt should stretch or deflect about 1 / 4 - 1 / 2 in. (6-13mm). If the belt is too tight or too loose, adjust/replace as necessary.
See Figures 1, 2 and 3
To adjust belts, first locate the mounting bolt on the air pump or alternator (each has its own belt and adjusts to permit that belt to be tensioned correctly). This bolt attaches the unit to the engine and has a nut on the end. Put a wrench on either end and loosen the bolt until there is practically no tension on it. Then, loosen the adjusting bolt, which is located on the opposite side of the unit and which passes through a slot. Pull the alternator or air pump away from the engine and tighten the adjusting bolt just enough to hold the unit while you check tension. Repeat the adjustment procedure until the belt deflects the proper amount, then fully tighten the adjusting and mounting bolts. Avoid too much belt tension or overtightening of bolts. A new belt should be tensioned just slightly more (about 0.4 in. or 10mm deflection) and checked after several hundred miles of operation to make sure that tension is still adequate. (Tension is lost very rapidly until a new belt is broken in.)
Fig. Fig. 3: On some GLC engines equipped with power steering, the pump pulley uses a slotted adjusting bar, adjusting bolt and locknut to adjust belt tension
Late model GLCs, 323s, 626s, MX-6s and 929s may use an adjusting bolt on either the idler pulley (a pulley which is not directly associated with any of the accessories) or on the power steering pump itself. This bolt makes adjustment much easier because you don't have to hold the accessory under a great deal of tension while tightening the mounting bolts.
On models where the idler pulley has a locknut at its center, simply loosen the locknut, then turn the adjusting bolt clockwise to increase belt tension or counterclockwise to decrease it or remove the belt. Do not forget to retighten the locknut when tension is correct, or vibration may cause it to fall off. Recheck the tension with the locknut tightened and readjust if necessary.
To adjust the power steering pump pulley on the GLC, loosen the slotted adjusting bar bolt, the mounting bolt across from it, and the locknut at the bottom of the adjusting bolt. Turn the adjusting bolt counterclockwise to remove the belt or reduce tension, and clockwise to increase it. When tension is correct, tighten the adjusting bolt locknut, adjusting bar bolt, and pump mounting bolt.
On 626, MX-6 and 929 models with a 4-ridge or 5-ridge ribbed type V-belt driving both the air conditioner and power steering pump, belt tension is much greater. With a used belt, deflection should only be about 1 / 4 in. (6.35mm).
See Figures 4, 5 and 6
The RX-7 may be equipped with as many as three or four separate drive belts. The belts are arranged at the front of the engine and drive the cooling fan/water pump, alternator, power steering pump, emission control air pump and air conditioner compressor (if so equipped).
Fig. Fig. 4: Checking belt tension on 1979-85 RX-7
Check the tension of each belt at the arrows numbered 1, 2, 3 and 4 (depending on year) shown in the illustration. Press on the belt with your thumb using moderate pressure (about 22 lbs.). The belts should give or deflect the amounts shown in the chart.
Fig. Fig. 6: RX-7 belt deflection limits
Use the following appropriate procedure and illustration to make drive belt adjustment(s).
ALTERNATOR AND AIR PUMP
See Figure 7
Fig. Fig. 7: Adjusting alternator drive belt tension on 1986-89 RX-7
When prying on the alternator or air pump, make sure the prybar is anchored against the engine case and not against a component (distributor cap, etc.) which could break.
Fig. Fig. 8: Adjusting air conditioning compressor drive belt tension on 1986-89 RX-7
Fig. Fig. 9: Adjusting power steering pump drive belt tension on 1986-89 RX-7
REMOVAL & INSTALLATION
May 27, 2012 | 1989 Mazda 323
on Dec 01, 2009 | Hyundai Elantra Cars & Trucks
Fig. Fig. 6: Loosen the pivot bolt ...
Fig. Fig. 8: ... slip the old belt off and install a new one
Fig. Fig. 9: Pull outwards to tension the belt
Fig. Fig. 10: Belt routing on the 20R, 22R and 22R-EC engines
Fig. Fig. 11: Belt routing on the 4ME, 5ME and 5MG-E engines
To adjust the tension of the alternator drive belt on all models, loosen the pivot and mounting bolts on the alternator. Using a wooden hammer handle, a broomstick or your hand, move the alternator one way or the other until the proper tension is achieved.
WARNING Do not use a screwdriver or any other metal device (such as a prybar) as a lever.
Tighten the mounting bolts securely. If a new belt has been installed, recheck the tension after about 200 miles (480 km) of driving.
Air Conditioning Compressor
A/C compressor belt tension can be adjusted by turning the tension adjusting bolt which is located on the compressor tensioner bracket. Turn the bolt clockwise to tighten the belt and counterclockwise to loosen it.
See Figures 12
To adjust the tension of the air pump drive belt, loosen the adjusting lever bolt and the pivot bolt. Move the pump in or out until the desired tension is felt.
The tension should be checked between the air pump and the crankshaft pulley on cars without air conditioning. On cars with A/C, the tension should be checked between the A/C compressor and the crankshaft pulley.
Fig. Fig. 12: Moving the air pump to tension the drive belt
Power Steering Pump
Tension on the power steering belt is adjusted by means of an idler pulley. Turn the adjusting bolt on the idler pulley until the desired tension is felt and then retighten the lockbolt.
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Fig. Fig. 5: 3.8L belt schematic-1993 shown
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