Disassembly; Cautions In Disassembly; Disassembling Procedure; Re-Assembly - Rietschle TWISTER VSA Serie Manual De Instrucciones

5.3 Disassembly (see spare parts list E 830)

5.3.1 Cautions in disassembly

(1) Put alignment marks on all connections and covers etc.
(2) Take measurements of all gasket thickness when they are disassembled.
(3) Keep disassembled parts away from dust, especially for bearings.

5.3.2 Disassembling procedure

(1) Remove all accessories from the pump unit.
(2) By opening drain valves, discharge cooling water from casing.
(3) Remove oil drain plug from front end cover 4 and drain oil.
(4) Remove socket bolts from seal adapter housing 25 and separate seal adapter housing from front end cover.
(5) Separate oil seal 21, speedy sleeve 20 and ball bearing 24 from seal adapter housing.
(6) Remove hex. bolt (M16) from front end cover 4 and front end plate 2, then separate front end cover.
(7) Remove power lock 15 from timing gear (A) 27 & (B) 28, by loosing socket bolt with wrench.
(8) Separate timing gear (A), (B).
(9) Remove bearing stopper (A) 13 & (B) 14 by loosing socket bolt with Hexagon wrench.
(10) Separate lock nut 16 with lock nut wrench and remove lock washer 17
(11) Separate bearing holder (A) 10 & (B) 11 from front end plate by securing hex bolt (M8) in tapping in bearing holder (A)
10 & (B) 11.
(12) Push out ball bearing 23 from bearing holder (A) 10 & (B) 11 with puller.
(13) Remove spacer (A) 36 from drive & driven shaft (A) 6, (B) 7.
(14) Remove mech. seal from drive & driven shaft (A) 6, (B) 7.
(15) Remove hex. bolt (M16) from casing 1 and front end plate 2. Secure hex. bolt (M16) in tapping in front end plate and
separate it from casing.
(16) Remove plate guide (A) 8, (B) 9 from front end plate by loosing socket bolts.
(17) Separate grease cover 5 from bearing holder (C) 12 by loosing socket bolts.
(18) Remove lock nut 16 with lock nut wrench, and pull out lock washer 17 & bearing push sleeve 36.
(19) Separate bearing holder (C) 12 from rear end plate by securing hex bolt (M12) in tapping in bearing holder.
(20) Pull out roller bearing 22 from bearing holder (C) 12 and remove lip seals 19 and speedy sleeve 20.
(21) Remove slip sleeve 39 from drive & driven shaft (A) 6, (B) 7.
(22) Remove lip seals (19) from slip sleeve 39.
(23) Remove spacer (B) 28 from drive shaft (A) 6, (B) 7.
(24) Remove hex bolt (M16) from rear end plate 3. Then, separate rear end plate 3 from casing 1 by securing hex bolt (M16)
on tap.
(25) Separate plate guide (B) 9 from rear end plate by loosing socket bolt (M8).
(26) Gently push out drive & driven shaft (A), (B) from casing and sling them with nylon string. Separate drive & driven shaft
(A), (B) from casing.
(27) Separate blind plates for water jacket from casing, covers, plates.
Clean all parts with good grade of clean solvent and replace any worn or damaged parts with factory approved parts. New
bearings, seals, gasket and o-rings should be installed at each assembly.
5.4 Re-assembly (see spare parts list E 830)

5.4.1 Cautions in re-assembly

(1) Check all parts for wear or damage during the disassembly. Damage at gasket faces or component locating faces will
greatly influence assembly. Therefore, utmost care is required for inspection of gasket faces and component locating
faces. If damage or wear is found, replace or repair.
(2) Clean bearings with light oil. Then apply lubrication on them. When handling bearings, always clean tools and hands.
(3) Use soft tissue and cleaning agent to clean dust from locating faces, and apply oil. For tight fits, use of Molybdenum
Disulphide is recommended since these fits will become hard to disassembleif corroded. Reassembly is more difficult
than disassembling. (For tapered sections of gear, clean the surface throughly with soft tissue and cleaning agent before
fitting).
(4) New gaskets should be the same thickness as those removed.
- 8 -