WEEKLY MAINTENANCE CHECKLIST

Make a habit of doing the following ONCE A WEEK:

  • Grease every fitting with lithium grease or the equivalent – one or two good pumps with a grease gun. Be thorough – there are more than 50 of them on each chute.
  • Check the threading on the rear leg lift – be sure the pulley clevis is not loosening from the cylinder shaft
  • Lubricate the roller chain

Daily high pressure washing is critical to keeping your chute in good condition and your farmers and cows happy. If you are not doing a weekly greasing of all your fittings, the water from the high pressure wash will get into your fittings and cause rust. Don’t miss the weekly greasing.


Lift Chains Need Attention

Don’t neglect your lift chain! Inspect the master link EVERY DAY you use the chute.

  • If there is any sign of weakness or separation, replace the link immediately.
  • Once a week, lubricate the entire exposed length of the lift chain.

Important Steps for Replacing Roller Lift Chains

The Roller Lift Chains need a full replacement EVERY THREE YEARS.
We suggest the following items be checked and replaced if necessary while changing the lift chain.

  • Jack tube sprocket
  • Rear idler sprocket
  • Front jack tube springs
  • Front jack tube foot

Listed below are the steps that should be followed to replace the roller lift chains.  Only one side is illustrated but both sides should be replaced at the same time.

Step 1

  1. Lift the chute about 12 inches and place a jack stand at the front of the chute for support.
  2. Retract the jack tube legs to take the pressure off of the lift chains and create some slack in the chains.
  3. Unplug chute from electrical power and close hydraulic accumulator valve so hydraulics will not operate.
Step 2
Lift up on the jack tube foot until a hole in the inner support tube is visible in the chute frame hole.  Place a screwdriver about 1″ in the chute frame hole so it prevents the inner support tube from falling lower.

Step2

Step 2

Step 3
With screwdriver still in place, remove bolt #1 and spring with jack tube foot will drop out of inner support tube.  If jack tube foot does not fall down you may have to use a hammer to loosen it.

Step3

Step 3

Step 4
Disconnect the master link at the location shown at #1 at the front of the chute. Tie a long rope onto the end of the last link of chain that you will be removing #2.

Step 4

Step 4

Step 5
Tie rope to old chain as shown.  HINT: Tie a screwdriver to the end of the rope so the weight of the chain doesn’t pull the rope all the way through the chute rail.

Step 5

Step 5

Step 6
Disconnect the master link at # 2 at the rear of the chute. A rope will later be used to guide the new chain through the chute rail #1.

Step 6

Step 6

Step 7
Pull the chain down and out at the rear of the chute.  HINT: May have to remove rear idler sprocket.

Step 7

Step 7

Step 8
In order to replace the inner section of the lift chain you will need to remove the front jack tube sprocket by removing the central bolt.  This is a good time to inspect the bearings on the sprocket. If they are gritty or loose, it is time to replace them.

Step 8

Step 8

Step 9

  1. Place jack tube lifting spacer #2 under inner support tube #1 and use small floor jack to support inner support tube.
  2. Remove screwdriver.

Step 9

Step 9

Step 10
Use the floor jack to raise the inner support tube up high enough so that the lift chain attachment nut #1 can be removed or cut off if rusted.  After the nut is removed, the old chain can be taken out.

Step 10

Step 10

Step 11

  1. Attach a new 3/4″ square head 3″ lift chain attachment bolt with a new master link onto the new 33″ long chain.
  2. Place a screwdriver between the bolt and the chain as shown and place the other end of the chain down into the inner support tube and out through the sprocket hole in the chute frame.
  3. Lift the screwdriver with the chain attached up until the bolt is visible on the top of the tube and screw the 3/4″ nylon locking nut onto the bolt and allow three threads to stick up past the end of the nut.
  4. Lower the jack until the nut is below the chute frame and the screwdriver can be placed in the inner support tube hole as in step 3.
  5. Remove jack and spacer.

Step 11

Step 11

Step 12

  1. To replace the jack tube foot and spring, feed a rope down through the hole in the inner support tube where the sprocket was until it comes out of the bottom of the tube.
  2. Tie the end of that rope to the top of the spring attached to the jack tube foot.
  3. Pull up on the rope pulling the spring and jack tube foot up until bolt #1 can be re-installed onto the spring hook.
  4. Remove the screwdriver.

HINT: When pulling spring up, run the rope over jack shaft above your head. This makes it much easier to pull down on the rope.

Step 12

Step 12

Step 13

  1. At the rear of the chute, reconnect the new lift chain to the welded chain splice with a new master link. If a master link retainer clip is used, the open part of the clip should point in the direction of chain pull.
  2. Replace the front sprocket.

Step 13

Step 13

Step 14
Tie rope from step 4 to first link of new 105″ long chain and route around sprocket.

Step 14

Step 14

Step 15
To place chains so they pull evenly, the first link of both new chains need to enter both jack shaft sprockets at the same time as shown in #1.

Step 15

Step 15

Step 16
Use new master link #1 to connect both new chains #2 and #3.  If a master link retainer clip is used, the open part of the clip should point in the direction of chain pull.

Step 16

Step 16

Step 17
Remove the front jack stand by using the chute hydraulic system.  Observe operation of the chute and make sure it raises and lowers evenly.