Disassembling And Assembling Central Wheel Lock

Information 

• Only disassemble the central wheel lock if the cone ring is very stiff and extremely difficult to turn and the grease reservoir has been used up.
• Thoroughly remove old grease and dirt particles.

Overview of individual parts: 

Fig 1: Central Wheel Lock Components Location

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Individual parts of central wheel lock

Information 

A circlip holds the cone ring in the central bolt.

1. Loosen cone ring -1-  from the central bolt by tapping it on a wooden base -2-  .

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   Loosening cone ring on central bolt

   1. 1.1 You may have to tap several times! 
2. Disassemble central wheel lock.

   The locking mechanism is secured in the central bolt. Never separate it! 

   1. 2.1  Thoroughly remove old grease and dirt particles on the central bolt and surfaces of the individual components.
   2. 2.2  Replace O-ring.

      Information 

      • Use only Molub Alloy Paste (Part number for 100-gram tube 000.043.305.08) as lubricant for the central wheel lock and wheel hub.
3. Re-grease surfaces of the disassembled central bolt (see table).

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   Overview of re-greasing central bolt (shown without locking mechanism)

   Surface	Designation	Grease with Molub Alloy Paste
   1	Circular area on central bolt -1-	Apply a thin  layer of grease => 0.8 - 1.2 grams of grease
   2	Trapezoidal thread on central bolt -2-	Apply a generous  amount of grease => 2.85 - 3.15 grams of grease.
   3	Washer (sliding base) -3-	Apply a thin  layer of grease => 0.8 - 1.2 grams of grease
   4	Circular area of cone ring -4-	Apply a thin  layer of grease => 1.05 - 1.25  grams of grease
   5	Reserve bores on cone ring -5-	Use 1.2 - 1.5 grams of grease in all 3 bores.
   6	Inner circular area on cone ring -6-	Apply a thin  layer of grease => 0.45 - 0.65  grams.
   7	Conical area on cone ring -7-	Apply a thin  layer of grease => 1.05 - 1.25  grams.

   1. 3.1 Coat new O-ring with acid-free grease. 

   Information 

   A circlip holds the cone ring in the central bolt.

4. Assemble central wheel lock. 
   1. 4.1  Insert friction washer.
   2. 4.2  Insert circlip with the open side -arrow 1-  in the cone ring groove  and swivel the cone ring into the central bolt (as shown in the illustration) -arrow 2-  .

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      Inserting cone ring

   3. 4.3 View of assembled central wheel lock. 

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   Central bolt with cone ring

   1	Central bolt
   2	Cone ring

5. Before fitting the wheel, always grease the conical surface with a thin  layer of Molub Alloy paste (see table, item 7).

   > Greasing cone ring 

   Make sure that no dirt gets into it! 

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   Greasing cone ring

6. Keep the gap -1-  between the thread and locking mechanism free of grease.

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   Gap on central wheel lock

   Information 

   If the locking mechanism is stuck, the central bolt must be replaced. 

   • The locking mechanism must no longer be replaced separately!

   Carry out the following checks on the removed central wheel lock:

   • Press the locking pin of the locking mechanism approx. 10 mm into the central bolt. When you let it go, the locking pin must snap back by itself!
   • The locking mechanism (inside) must turn clockwise (audible click), not  anti-clockwise!
   • Irregular clicking, delayed locking, skipping or sticking are telltale signs of damage => Replace central wheel lock!
7. Function test on locking mechanism and cone ring: 

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   Checking central wheel lock

   • Check that it is fitted securely and turn the cone ring 360° by hand once.
   • Press the locking pin of the locking mechanism approx. 10 mm into the central bolt. When released, the locking pin must snap back automatically -Figure 2 -  .
   • If this is not the case, -Figure 1-  turn the locking mechanism on the inside by approx. 1° to 2°. The pin should then snap back.
   • If the locking mechanism still sticks => Replace central wheel lock! 
   • It must be possible to turn the locking mechanism (inside) clockwise  (audible click), but not anti-clockwise! 
   1. 7.1 Always follow instructions! 

      The cone ring -1- must turn in both directions with no great resistance or jerking -Arrows-  !

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      Turning cone ring