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Troubleshooting Guide

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 Dishmaster M76 Troubleshooting

Spout Dripping

 

  1. Adjust handles. Pg. 2, Step 11 of instruction manual ( M76 Instruction Manual )
    1. Remove screw from handle, remove handle, put handle back on at the 6:00 position, without screw. To adjust hot side, slowly turn handle clockwise until the drip stops OR handle feels snug. For the cold side, turn handle counter-clockwise until drip stops OR handle feels snug.
    2. Remove handle again and replace at the 3:00 position for cold, and the 9:00 position for hot and put the screws back in.

     

  2. Replace Valve Stem Ends, Kit #858 (see photo), pg. 8, M76 Instruction Manual ) For M87 you will need to replace the stems with Kit #1078 (see photo) & Kit #1079 (see photo). The seals or stems are no longer available for the M87, they must be replaced with M76-style stems and seals.
    1. Remove screws from handles
    2. Remove handles
    3. Remove cover nuts, if stuck using a flat-headed screwdriver wedge into notch on the front edge of cover nut and using a hammer tap gently counter clockwise.
    4. Remove lock nuts.
    5. Pull stem straight out.
    6. If stem will not pull out, you will need to go in from behind and push them out. (See step 3)
    7. Pull the seal off of the end of the stem, snap the new one on.
    8. Screw your bushing (red or blue) down onto the stem as far as it will go then back it up ¼ of a turn.
    9. Replace stem into body, lining up the notches on the bushings.
    10. Replace lock nut.
    11. Replace cover nuts.
    12. Replace handles.
    13. Replace screws.

  3. Check valve seats. Look for pitted or peeling chrome, Kit #1230 (see photo), (pg. 8, M76 Instruction Manual )
    1. Remove handle screws.
    2. Remove handles.
    3. Remove cover nuts (see 2c)
    4. Remove soap tank cover.
    5. Remove cover by sliding forward towards you being careful to slide hose clips out of the side of the cover (it is 2 pieces so be careful)
    6. Remove soap tank.
    7. Looking in the back of the unit, you should see 2 nuts that say hand tighten only. (Union Coupling Nuts)
    8. Remove unit from the Unions.
    9. Using a Large flat-headed screwdriver (older M76) or an allen wrench remove the seats.
    10. Once you have replaced the seats reverse these directions to put everything back together.
  4. Bushing stripped, Valve Stem Bushings Kit #1075 (see photo)
    1. Remove screws from valve handles.
    2. Remove valve handles.
    3. Remove cover nuts (see 2c)
    4. Remove lock nuts.
    5. Pull stem straight out.
    6. Take old bushing off.
    7. Screw new bushing down as far as it will go, then back it up ¼ of a turn.
    8. Replace stem lining up notches on bushing with notches in valve body.
    9. Replace lock nuts.
    10. Replace cover nuts.
    11. Replace handles.
    12. Replace screws in handles.

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Spout Leaking at Diverter Rod Knob

  1. Flip diverter seal over. (#542) (see photo)
  2. Replace diverter rod assembly with Kit #1088 - Center Section Seals (see photo).

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Valve Body Leaking

  1. •  Check for solder joint cracks. #1077, (pg. 3, M76 Instruction Manual )
  2. Check if seats are tight. (pg. 8, M76 Instruction Manual )
    • Follow step #3 under "Spout Dripping", to get to the seats and make sure they are tight.

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Unions Leaking

  1. Check Union Coupling Nuts (#1032) to make sure they are tight. Replace if needed.
  2. Check if seats are tight. (pg. 8, M76 Instruction Manual )
    • Follow step #3 under "Spout Dripping", to get to the seats and make sure they are tight.

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Insufficient water volume

  1. Check Kit #1178 Aerator (see photo) (pg. 8)
  2. Check screens in union heads, Kit #1089 (see photo), (pg. 7, M76 Instruction Manual )
    1. Follow step #3 under "Spout Dripping", once you have the unit off of the unions, look inside of your unions and there should be a cone shaped screen that is pushed in flush with an o-ring in a groove.
    2. Clean these if you can or replace the screens and o-rings with Kit #1089 - Union Screens (see photo).

  3. Check 8 holes in Kit #2315 - Insert and Seals Kit (see photo), (pg. 7, M76 Instruction Manual )
    1. Remove handles from screws.
    2. Remove handles.
    3. Remove cover nuts.
    4. Remove Soap tank lid.
    5. Pull the chrome cover forward. Be careful when you slide the hose retainer (it consists of two pieces)
    6. Remove the Spout.
    7. Using an Allen wrench remove the threaded insert and take it out.
    8. Check the 8 holes in the little disk, making sure they are not clogged up.
    9. Reverse the directions to put it all back together.

  4. Stem ends may have come off stems. (see photo).
    1. See Step #2 under "Spout Dripping".
  5. Re-assemble stem assembly from start to finish.

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No soap from is being dispensed

  1. Check and clean tank and backflush unit. (pg. 4, M76 Instruction Manual )
    1. First check the detergent solution. It should not be much thicker than water itself. If you find a thick gummy solution in the bottom of the tank, WASH IT OUT.
    2. Check the small hole in the bottom of the Tank Vent Tube in the tank. If it is clogged, open it with a hairpin or small wire. (paper clip)
    3. Remove the Spray Tube Assembly from the handle by unscrewing it with your fingers or pliers.
    4. Open the cold water valve to allow ONLY A SMALL STREAM of water to flow from the spout. (Caution should be used not to open water valve too much as the water may spray up the wall in back of your sink when back-flushing)
    5. Place your index finger over the end of the tube and hold the RED detergent button on the handle down with your thumb.
    6. Pull the diverter rod up with your other hand. This simple operation will force the water back through the detergent line of the hose and out through the Tank Vent Tube, thus flushing out any foreign matter or congealed detergent which may have had the hose blocked. (If the water does not come out of the Tank Vent Tube, open the water valve a little more and repeat the procedure.) When the water comes out of the Tube as shown in the picture, place your index finger over the top of the tube, thus forcing water thru the small Detergent hole at the bottom of the Tank.
    7. Now screw the Spray Tube Assembly back onto the handle and try your DISHMASTER to see if it draws suds properly. If you do not get any suds or if the suds will not shut off then you will need to replace the Needle Valve Kit, #264 (see photo). Alternatively, you can choose to replace the entire hose (see photo) or the hose and spray assembly (see photo). Replacing either of these will also fix the soap dispensing problem.

  2. Venturi in handle must be tight to hose.
  3. Check to make sure needle valve tip has not come off. (see photo), (pg. 5, M76 Instruction Manual )
  4. Check black hose at soap tube. If there is a crack, replace hose. Kit # 254, (pg. 5, M76 Instruction Manual )
  5. Make sure that there isn't a crack in clear hose from soap tube to the tank.
  6. Check spray disc . Holes should be open. You should be able to see "OUT" printed on the disc when reassembling. If you see "IN", the disc is installed backward, (pg. 5, M76 Instruction Manual)

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Leaks at Bottom Nut

  • Replace 206 O-ring at the bottom nut.

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Diverter Rod Sticks

  • Apply lubricant to the diverter rod, such as Plumber's Grease, vegetable oil, Vaseline, etc.

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If Cover Nuts Are Stuck

  • Cover rings may corrode. Tap loose with screwdriver and hammer. Do NOT use channel locks as this may squeeze the rings out of round.
  • If build up exists, try using a product to disolve mineral deposits such as CLR, vinegar or lemon juice.

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