P.O. Box 40525 · Houston, Texas USA 77240-0525
Tel: 713·466·3552 · Fax: 713·896·7386
www.norriseal.com
1001-0113O — ©2013, January 2013
the Level Adjusting Bar. The cap
on the level adjusting screw will
be pointing AWAY from the two
cap screws on the shaft end of the
Level Adjusting Bar.
4. Slide the Level Adjusting Bar onto
the shaft against the spacer with
the Level Adjusting Screw OPPO-
SITE the controller body. Snug,
but do not tighten, the cap screws
that secure the bar to the shaft.
5. Temporarily slide the Torque Bar
onto the shaft. Position the Level
Adjusting Bar so that the Torque
Bar is parallel with the displacer
arm when the round tip of the
level adjusting screw is touching
the Torque Bar.
6. Remove the Torque Bar and
tighten the cap screws that secure
the Level Adjusting Bar to the
shaft, starting with the screw near-
est the slotted end of the Level
Adjusting Bar, taking care not to
overtighten.
7. Slide the Torque Bar back onto the
shaft with the counter-sunk hole
for the spring retainer facing
down. (For left hand mount, the
hole is on the left side. For the
right hand hole, the hole is on the
right side.) Secure the Torque Bar
with the lock nut leaving 1⁄16-in.
clearance between the nut and the
Torque Bar. NOTE: DO NOT
tighten this nut; the Torque Arm
must move freely.
8. Slide the Flapper Bar onto the
Pivot Pin. If converting the case
mounting, remove the thumb
screw from the Sensitivity Fulcrum
and screw it into the opposite side
of the Fulcrum. Try to keep the
Fulcrum positioned in the same
place on the Flapper Bar. Use the
left Pivot Pin for left hand mount
direct acting or right hand mount
reverse acting. Use the right Pivot
Pin for right hand mount direct
acting or left hand mount reverse
acting. Secure the Flapper Bar
with the lock nut. NOTE: DO NOT
tighten this nut; the Flapper Bar
must move freely.
9. Install the stud bolt and lower
spring retainer in the lower pilot
case. The bolt stud will be on the
left for left hand mount and on the
right for right hand mount.
10. Install the spring and upper
spring retainer, centering the
retainer pin with the hole in the
Torque Bar.
2.4 P
ILOT
R
EMOVAL
/R
EPLACEMENT
WA R N I N G !
Before attempting any repairs, isolate the
controller from the system and make sure
that all pressure is released from the
controller body. Shut off and vent supply
and output (signal air) lines to the con-
troller. On electric pilots, disconnect all
power to the controller.
W A R N I N !
C A U T I O N
Pneumatic and Electric Pilot cases are
NOT interchangeable. Do not attempt to
replace a Pneumatic Pilot with an Electric
Pilot or vice versa.
A. Pneumatic Pilots
1. Remove the supply and output
lines from the rear of the
controller.
2. For the 1001 controller, the pilot
is held in place by two cap screws
mounted through the top of the
case. Remove these cap screws
and remove the pilot from the
case.
3. For the 1001A and 1001XL con-
trollers, the pilot is held in place
by four cap screws in the Pilot
Clamp. Remove these four cap
screws and remove the pilot from
the case.
4. If necessary, rebuild the pilot
following the instructions pro-
vided in the Pilot Re-build Kit
(PRK). Alternately the pilot can be
totally replaced. Pilot action may
be converted from snap to throttle
or vice versa by using a Pilot
Conversion Kit (PCK). Use only
genuine Norriseal parts kits or
pilots.
5. Re-install the pilot by reversing
instructions 1 through 3 above.
While the Pilot Gasket may not
need replacing on the 1001A and
1001XL controllers, replacement
is recommended.
B. Electric Pilots —
Explosion Proof
1. DISCONNECT THE POWER
SUPPLY CIRCUIT BEFORE
CONTINUING.
2. Disconnect the wire leads.
Remove the screws holding the
basic switch in the case and then
the basic switch.
3. Place the replacement switch in
the insulator, insert the screws,
and place the assembly in the
case.
4. Tighten the screws and connect
the lead-in wires.
5. Be certain the small compression
spring is returned to its position
between the top of the basic
switch and the internal lever (or
above the internal lever in the case
of the CCW actuated switches).
O
PERATING AND
M
AINTENANCE
M
ANUAL
Series 1001, 1001A, 1001XL Level Control
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