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V. DISASSEMBLY, CLEANING
AN D REASSE MBLY
M P ORTANT I Before doing any maintenance task, check the
pumping conditions of the ,Installation
possible radioactivity of pumped gases. Proceed as
depending on the specific case
-
flush system with dry nitrogen before doing any work on It
-
w ear gloves, goggles, and a mask If requir ed
- ventilate area thoroughly and disassem ble equipment
beneath a fume hood If necessary ;
■
-
collect residue
In appropriate containers.
Routin e mainte nance of Alcate l 1 004 A, 2004 A, 2008 A, , 0 1 2 A ,
20 1 2 A and 2020 A requires only periodic on
I n the event of heavy contaminatio n, wear. or an o perating break·
down,
the pump must be disassembled (see §
Replace all seals whenever the pump Is disassembled (see §
The only tools needed are a few wrenc h es, found In any
nance shop (see § 5.6).
Before disassembly, drain o!I (see §
The first step Is to remove the m oving parts from the oil
second step is to disass e m b l e the moving parts.
5.1 DISASSEMBLING MOTOR-PUMP ASSE MBLY
(see general drawing)
Stand p u m p on end with motor at top, restin g on front of oil
This greatly facilitates the first p hase of d isassembly.
-
Remove
4
n uts
(H).
-
Remove handle plate
(4)
together wil h
damage flat gasket
(
1
2).
The two parts of lhe motor coupl ng sepa•
r--
rate,
one on the motor side
:i u m p s with an American standard motor have an adapter plat e
( 1 1 4 ) b , twi::.::,n handle
plate
-
Set pump on base
and
remove oil case
5.2 DISASSEMBLING MOVING PARTS
- Remove base (3) by unscrewing screw (A).
- Rotate fan (9) u ntil set screw (F) can be u n screwed from bottom of
p u m
p.
Remove fa n coupling (9) and splln& (1 9).
- Remove felt (1 1) and throw it.
- Unscrew screw (B) and remove retaining bracket
Remove i nlet plate (1 00), filter (29), and exhaust plate ( 1
- Remove valve cover (60) by unscrewing screws (E).
Remove valve springs (61 ) and valves (57) ( 1 004 A Pump
- Disassembling Gas Ballast
.
• Remove screw
(2. 1 )
• Remove knob (20), piston (22), spring {24), and flap valve (2. 3 ).
- Dlsassembllng Seallng System
Note : The sealing system is set at the
disassembly (see reassem
nance, see § 6.3.
However,
altering the setting of the sealing
, Remove impeller cam (32) by removing circllp (34), leaving
suckback lever (54) In place.
Do not remove the oil Jet (50) for
spray with a jet of co�pressed air to remove any
- Removing Rear Plate (39)
• Unscrew three n uts (G).
•
Insert two screwdrivers into the two notches. Twist simulta
neously screwdrivers to remove plate at'i g n ment
flange straight reta ning HP Rotor
:
toxicity, corrosion,
follows,
;
changes.
VII).
4.5).
case.
motor.
Be care fu l not to
and
the other on the pump side.
(4) and
motor.
(2).
(30).
·
factory.
It must be reset atter
bly,
§
5.5
g).
For sealing system malnte·
rear plate can be dis assemb l ed without
system.
cleaning.
When
reassembling,
obstructions.
pins.
Remove
(35).
Remove O-ring (55).
5..2.1 Dlsassembllng Two-Stage Pumps 2004 A, 2008 A, and
201 2 A 2020 A .
a) Removing HP Rotor (35)
" Remove rotor (3 5) by sliding It out off
• Remove va_nes (4�}
b) Removing HP Stator (40)
• Insert two screwdrivers Into the two notches In stator (40) and
proceed as In § "Removing rear
i
• Remove O·ring (55) .
c) Removing Central Plate (4 1 )
• Insert two screwdrivers Into the two notches and proceed as In
§ "Removi ng rear Plate". Remove O-ri ng (55).
• Oil Jet (49) lubricates the fi rst stage. Do not remove II for clea·
ning.
W h e n reassemblin
any
obstructions.
d) Removing LP Rotor (44)
•
Remove rotor
6.1
).
•
Remove vanes (48) and springs (46).
mainte
e) Removing LP Stator (42)
• Insert two screwdrivers Into the two notches and proceed as In
The
§ " Removing rear
f) Removing Front Plate (43)
•
Insert two screwdrivers into the two notches and proceed as in
§ "Removing rear
•
Remove spr ing (26) and gas ballast bearing
• Remove O·rl ngs (55) and
case.
I M PORTANT NOTE
When reassembling, do not confuse HP stator (40) and LP sta
tor (42). HP stator (40) has an additional hole to admit air from
gas ballast.
03),
STATOR LP 42
1
valve).
5.2.2 Disassembly of Single-Stage Pumps
1 004 A and 1 01 2 A
-a) Removing Rotor
•
Remove rotor ( 52) by sliding it o u t off
•
Remove vanes (47) and springs
b Removing Stator
anti·
• Introduce two screwdrivers Into the two notches on stator (52)
and proceed as in § "Re m ov i n g rear
• Remove O·rlng (55).
Since the clearances are part l cularly tight In the 1 004 A and
1 0 1 2 A
pumps,
pairs.
c) Removing Front Plate (43)
See §
5.2. 1
f).
stator.
.and
!P,ri_ngs .(4
6).
Plate".
g,
spray Wit h compressed a ir to remove
(44).
Plate".
Remove O·r l n g
(55).
Plate".
(56).
:
2004
A
Pump
STATOR HP 40
:
stator.
(4
6).
Plate".
rotors and stators are sold only as matched
(25).
26
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