REASSEMBLY
- The reassembly process is basically the
disassembly procedure in reverse order.
1. Place the movable contact support and armature assembly
(Item 2) in the contactor base.
IMPORTANT
- Be sure the movable contact support is
below the cam on the mechanical interlock.
2. Install the contact block cover and tighten screws securely
(25-30 inch-pounds).
3. Insert the yoke (item 8) into theoperating coil (Item 7). Place
the yoke-coil assembly into the contactor base. The parts are
keyed to fit only one way.
4. Replace the coil cover (Item 4). If used, check the tie point
terminal for proper position. Tighten the coil cover screws
securely 25-30 inch-pounds).
5. With the movable contact support and armatureassembly in
the "OFF" position, install the auxiliary contact block(s) (Item
6), using instructions on Page
6. Reconnect control wires to the operating coil and tie point
terminal.
Proper Tie Point
Terminal Position
REPLACING MECHANICAL INTERLOCK
- All power and
e x t e r n a l c o n t r o l w i r i n g t o t h e B u l l e t i n 5 0 5 m u s t b e
disconnected and the entire assembly must be removed from
the enclosure or panel to replace the mechanical interlock.
Tag removed wires.
1.Loosen and remove from the right hand contactor all
i n t e r c o n n e c t i n g p o w e r w i r e s l e a v i n g t h e s e w i r e s
connected to the left hand contactor. Completely remove
the interconnecting power strap.
2.Loosen and remove from the right hand contactor all
interconnecting control wires by removing them from
terminals and by removing the auxiliary contact blocks.
(See Page 6 for auxiliary contact block removal.)
3.Each contactor mounting plate (Item 20) is secured to the
Bulletin 505 mounting plate (Item 21) with three 5/16-18 x
7.16" screws (Item 16). Remove these screws from the right
hand contactor and slide it off the mounting plate.
4.Determine if the old mechanical interlock is a fixed or
adjustable type: The fixed type is mounted directly to the
mounting plate (Item 21) and has no locating bracket
subassembly. The adjustable type has a locating bracket
subassembly and is shown in Figure 3.
5.If the mechanical interlock is an adjustable type, no
mounting plate modifications will be necessary and steps
6, 7, 8 and 9 are omitted. Remove and discard the entire old
interlock assembly and proceed to step 10.
6.If the mechanical interlock is a fixed type, remove and
discard it, and mark the two #10-32 mounting screw holes
for future reference.
7.Remove the left hand contactor in the same manner as
step 3.
8.Modify the Bulletin 505 mounting plate per MOUNTING
P L A T E M O D I F I C A T I O N S F O R A D J U S T A B L E
M E C H A N I C A L I N T E R L O C K s u p p l i e d w i t h t h e n e w
mechanical interlock.
9.Install the left hand contactor onto the Bulletin 505
mounting plate with the 5/16-18 x 7/16" screws. (Torque to
110-130 inch-pounds).
10. Install the new adjustable mechanical interlock and
l o c a t i n g b r a c k e t s u b a s s e m b l y o n t h e B u l l e t i n 5 0 5
m o u n t i n g p l a t e u s i n g t h e #10-32 x 7/8" T e n s i l - L o c k
mounting screws with spacers. Securely tighten the lower
locating bracket screw only (24-29 inch-pounds). The
upper and middle mounting screws should remain hand
tight to allow for later adjustment. Refer to Figure
on Page
. Do not install support bracket at this time.
IMPORTANT-
Be sure the “projection” on each side
of the mechanical interlock is inserted into the slot in
that each cam is above the movable contact
11.Install the right hand contactor onto the Bulletin 505
mounting plate with the 5/16-18 x 7/16" screws. See
important note above. (Torque screws to 110-130 inch-
pounds).
12.Adjust m e c h a n i c a l i n t e r l o c k p e r M E C H A N I C A L
INTERLOCK ADJUSTMENT procedure on Page
13.Reconnect the interconnecting power wires and strap.
Tighten screws securely (162-198 inch-pounds). Verify
proper connections per wiring diagram supplied with
starter.
14.Replace all interconnecting control wires and auxiliary
contact blocks that were removed in step 2. (See Page
auxiliary contact block installation.) Verify proper
connections per wiring diagram supplied with starter.
15.Reinstall the complete Bulletin 505 assembly in the
enclosure and reconnect theexternal control, line and load
wiring
Figure 3
Adjustable
Mechanical Interlo
Locating
\
Bracket
Subassembly
Movable
Contact Support
ck
3
