Republic Manufacturing RB800 Instructions for use

CENTRIFUGAL BLOWER MAINTENANCE SCHEDULE
RB800, RB1200HC, RB2400
R
MANUFACTURING
EPUBLIC
RB800
RB1200HC
RB2400
COMBINED FLUID PRODUCTS COMPANY
www.cfpco.com ●[email protected] ●[phone]

2
REPUBLIC NOTES
Service procedures should only be performed by trained service personnel.
CONTENTS
Read the following safety instructions carefully. Disconnect blower from electrical source before
attempting service.
WARNING
IMPORTANT
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3
REPUBLIC NOTES CONTENTS
Filter Maintenance...............................................15
Bearing Maintenance...........................................16
Tension Pulley Maintenance................................17
Motor Pulley and Bushing Maintenance.............18
Bore Part Number............................................... 19
Replacement Parts..........................................20-22
Trouble Shooting Guidelines..........................23-24
Warranty Terms and Conditions.........................25
Warning and Important Note................................2
Safety Instructions.................................................4
Drive Belt Information..........................................5
Belt Sizing Information.........................................5
Belt Removal and Installation............................6-8
Spring Replacement Installation...........................9
RB2400 Replacement Parts Reference.................10
Belt Maintenance..................................................11
Motor Pulley Information...................................12
Motor Pulley Installation.....................................13
Blower Pulley Removal........................................14
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4
SAFETY INSTRUCTIONS
1. Always use qualied electrical and mechanical personnel for installation and maintenance of Republic
blowers and motors.
2. Disconnect the electrical power at the motor starter, fuse box or circuit breaker before working on the
system. Take special precautions to make sure the power cannot be turned on while you are working on the
blower. Use an approved Lock Out/Tag Out system.
3. Make sure the motor is electrically grounded, the mounting bolts are properly secured, and all guards are
in place before start-up.
4. Wear safety glasses and earplugs when working on the blower, air knife or discharge nozzles within a
Republic Blower System.
5. Do not operate blower/motor assembly with the belt guard removed. Make sure to install the inlet air lter
or piping to blower inlet, before starting the blower/motor.
6. Do not operate blower with the outlet open to atmosphere. Connect system piping or buttery valve to
prevent overloading the motor. Check the nal installation for proper amp loads.
7. Keep all tools, loose clothing and hands away from rotating or moving parts while the unit is running.
Never run the blower unit without the belt guard installed.
8. Inspect the blower at regular intervals for damaged or worn parts. REPLACE DAMAGED PARTS
IMMEDIATELY. DO NOT CONNECT OR TURN ON A DAMAGED BLOWER.
9. Inspect the inlet air lter at regular intervals and replace when necessary. A dirty air lter can cause
improper blower performance.
10. Use only genuine Republic Manufacturing brand replacement parts.
REPUBLIC CENTRIFUGAL BLOWER MAINTENANCE SCHEDULE
RB800, RB1200HC, RB2400
COMBINED FLUID PRODUCTS COMPANY
www.cfpco.com ●[email protected] ●[phone]

5
DRIVE BELT INFORMATION
Republic utilizes a 16-groove belt on all its centrifugal blowers and has the part number stamped on the at
side of the belt. Republic recommends that you keep spare belts in stock. It is also recommended that replace-
ment belts be purchased from a Republic distributor, to ensure that belt quality and blower performance are maintained.
Belts do vary from manufacturer to manufacturer, and all Republic belts are inspected for belt thickness and
imperfections prior to shipment.
BELT SIZING INFORMATION
Please nd the part number stamped on the face of the small stainless steel blower pulley, and then refer to the
following chart for the correct belt size.
RB800/ RB1200HC REPLACEMENT PARTS REFERENCE
Blower Pulley Part No. Belt Part No. Tension Pulley Part No.
RB800 RB1200HC RB800 RB800-STB RB1200HC RB800 RB1200HC
230-0145 N/A 230-3800K 230-5925 N/A 200-0214 N/A
230-0155 231-0155 230-3800K 230-5925 230-4600K 200-0214 200-0206
230-0165 231-0165 230-3800K 230-5925 230-4600K 200-0214 200-0206
230-0175 231-0175 230-3800K 230-5925 230-4700K 200-0214 200-0206
230-0185 231-0185 230-3800K 230-5925 230-4700K 200-0214 200-0206
230-0195 231-0195 230-3800K 230-5925 230-4700K 200-0214 200-0206
230-0205 231-0205 230-3800K 230-5925 230-4700K 200-0214 200-0206
230-0215 231-0215 230-3900K 230-5925 230-4700K 200-0214 200-0206
230-0225 231-0225 230-3900K 230-5925 230-4700K 200-0214 200-0206
230-0235 231-0235 230-3900K N/A 230-4700K 200-0214 200-0206
230-0245 231-0245 230-3900K N/A 230-4700K 200-0214 200-0206
230-0255 231-0255 230-3900K N/A 230-4800K 200-0214 200-0206
230-0265 231-0265 230-3900K N/A 230-4800K 200-0214 200-0206
230-0275 231-0275 230-3950K N/A 230-4800K 200-0214 200-0206
230-0285 231-0285 230-3950K N/A 230-4900K 200-0214 200-0206
230-0295 231-0295 230-3950K N/A 230-4900K 200-0214 200-0206
Important: Replace spring with every belt replacement to ensure proper tension on your new belt. e follow-
ing pages should show the proper procedures for belt installation and removal and for spring replacement.
REPUBLIC CENTRIFUGAL BLOWER MAINTENANCE SCHEDULE
RB800, RB1200HC, RB2400
COMBINED FLUID PRODUCTS COMPANY
www.cfpco.com ●[email protected] ●[phone]

6
BELT REMOVAL AND INSTALLATION
FIGURE 1
e same belt removal and installation procedure ap-
plies for the RB2400 model with one exception– there
are two (2) belts.
NOTE:
Tension Block rotated
counterclockwise (CCW)
(Tension Pulley removed
for clarity)
In order to remove or replace the Belt, the Tension
Block Assembly must be rotated out of the way to
allow for the Tension Arm to swing (CW). Loosen
the 5/16-18 SHCS as shown in Figure 1, the screw is
located on the backside of the Mounting Plate. Use a
1/4” allen wrench (not shown) on the 5/16-18 SHCS.
FIGURE 2
Once the 5/16-18 SHCS is removed, rotate the Tension
Block (CCW) to allow for the Tension Arm to swing
(CW) as shown in Detail B.
Tension Arm
DETAIL B
REPUBLIC CENTRIFUGAL BLOWER MAINTENANCE SCHEDULE
RB800, RB1200HC, RB2400
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7
DETAIL B
Using a 1” open-end wrench, as shown in Figures 3 and 4, rotate the Tension Arm Assembly clockwise (CW)
and remove the Belt. You may release the pressure on the wrench and allow the Tension Arm to swing back
into position once the Belt has been removed.
BELT REMOVAL AND INSTALLATION
1” Open End
Wrench
Tension Block
rotated away
Tension Pulley rotated
away from belt
Set Screws
Tension Pulley
Belt
FIGURE 3 FIGURE 4
Blower Pulley
Motor Pulley
FIGURE 5 FIGURE 6
Using a 1” open-end wrench, rotate the Tension Arm Assembly clockwise (CW). Wrap the new or replacement
Belt around the Blower Pulley and then onto the Motor Pulley as shown in Figures 5 and 6. Once the Belt is in
place and the wrench is removed, verify that the Belt is seated into all the grooves on both pulleys by manually
rotating the Motor Pulley (large pulley), and checking the alignment of the Belt on the groves.
e same belt removal and installation procedure applies for the
RB2400 Model with one exception– there are two (2) belts.
NOTE:
REPUBLIC CENTRIFUGAL BLOWER MAINTENANCE SCHEDULE
RB800, RB1200HC, RB2400
COMBINED FLUID PRODUCTS COMPANY
www.cfpco.com ●[email protected] ●[phone]

8
BELT REMOVAL AND INSTALLATION
FIGURE 7
FIGURE 8
Serial No. Location
Tension Arm
5/16-18 SHCS for
Tension Block
Tension Block
DETAIL B
Rubber Block
5/16-18 Hex Nut
5/16-18 SS Hex
HD Screw
Tension Block
(Tension Pulley removed for clarity)
Rotate the Tension Block (CW) back into position
and reinstall 5/16-18 SHCS through the back side of
the Mounting Plate using a 1/4” allen wrench.
e Tension Block is not to be used for tensioning the belt. e purpose of the Tension
Block is to help control the Tension Arm “backlash” on motors with high starting torque.
NOTE:
Using a at blade screwdriver, adjust the
slotted 5/16-18 SS Hex Head screw on
the Tension Block until the Hex Head
just touches the Rubber Block on the
Tension Arm assembly. Tighten jam nut
with a 1/4” wrench and reinstall the belt
guard cover.
e hex head screw is not designed to put additional pressure on the Tension Arm or Belt, it is intended to pre-
vent the backward movement of high torque motors.
NOTES:
e same belt removal and installation procedure applies for the RB2400 Model with one exception– there are
two (2) belts.
REPUBLIC CENTRIFUGAL BLOWER MAINTENANCE SCHEDULE
RB800, RB1200HC, RB2400
COMBINED FLUID PRODUCTS COMPANY
www.cfpco.com ●[email protected] ●[phone]

9
SPRING REPLACEMENT INSTALLATION
Important–Replace spring when replacing belt to insure proper tension on you new belt.
1. Remove spring from 1/4 shoulder bolt on blower mounting plate.
2. Remove the tension pulley assemply from mounting plate by removing pivot pin (Item 11).
3. Remove the tension pulley sha (Item 3). THis sha has le-handed threads, so you will need to turn
clockwise to loosen. Items 4, 5, 6, 13, and 14 will remain attached to Item 3.
4. Remove shoulder bolt (Item 12).
5. Replace spring and reinstall shoulder bolt (Item 12).
6. Reinstall tension pulley assembly to mounting plate by tightening pivot pin (Item 11). Use Loctite 242
(removable strength) and torque to 25 /lbs.
7. Apply Loctite 242 (removable strength) to tension pulley sha threads (Item 3) and install to tension arm
(Item 2). Twist tension pulley sha counterclockwise to tighten.
8. Reinstall spring to 1/4 shoulder bolt on blower back plate.
Mounting Plate
1/4 Shoulder Bolt
Item No. Part No. Qty. Description
1 210-0701 1 Spring Ext. .080 Tension Pulley
2 290-0107 1 Tension Arm
3 250-0406 1 Bearing 6301-2RS
4 250-0701 2 Shaft TP Double Brg.
5 230-0707 1 5” Double Bearing Tension Pulley
6 210-0502 1 Retaining Ring N5000-145
7 290-0201 1 Rubber Block
8 210-1504 2 Screw, SS 1/4-20 x 5/8 Button Soc. Hd.
9 250-0703 2 Flanged Nylon Bearing 10L7-F
10 210-0310 1 Washer, SS 1-3/16 x 5/16 x .058
11 250-0402 1 Pivot Pin Tension Pulley
12 210-0603 1 Shoulder Bolt, SS 3/16 x 5/16
13 250-1007 1 Seal TP CR6767
14 250-1008 1 Seal CR13514
Spring replacement procedure is the
same for both the 4” and 5” Tension
Pulley Assemblies.
NOTES:
REPUBLIC CENTRIFUGAL BLOWER MAINTENANCE SCHEDULE
RB800, RB1200HC, RB2400
COMBINED FLUID PRODUCTS COMPANY
www.cfpco.com ●[email protected] ●[phone]

10
e RB2400 model comes equipped with two (2) blower heads and may require a combination of Tension
Pulley Assemblies. When looking at the belt side or the belt guard side of this blower, the le side head is
called and engraved with the letters “H1” and the right side head is called and engraved with the letters “H2”.
e center distance of the motor pulley and blower pulley sha on the “H1” side is slightly shorter than the
“H2” side.
In order for the proper belt sizes to function on this blower, the combination of 4” and 5” Tension Pulley
assemblies were incorporated. Use the chart below to nd which Tension Pulley is required on either the
“H1” side or “H2” side of the blower.
RB2400 REPLACEMENT PARTS REFERENCE
REPUBLIC CENTRIFUGAL BLOWER MAINTENANCE SCHEDULE
RB800, RB1200HC, RB2400
RB2400 REPLACEMENT PARTS REFERENCE
Blower Pulley Part No. Belt Part No. Tension Pulley Part No.
RB2400 H1 Side RB2400 H2 Side RB2400 H1 Side RB2400 H2 Side
231-0175 230-5200K 230-5500K 200-0206 200-0214
231-0185 230-5200K 230-5500K 200-0206 200-0214
231-0195 230-5200K 230-5600K 200-0206 200-0206
231-0205 230-5200K 230-5600K 200-0206 200-0206
231-0215 230-5200K 230-5600K 200-0214 200-0206
231-0225 230-5200K 230-5600K 200-0214 200-0214
231-0235 230-5200K 230-5600K 200-0214 200-0214
231-0245 230-5300K 230-5600K 200-0206 200-0214
231-0255 230-5300K 230-5600K 200-0206 200-0214
231-0265 230-5300K 230-5600K 200-0206 200-0214
231-0275 230-5300K 230-5600K 200-0206 200-0214
231-0285 230-5300K 230-5800K 200-0206 200-0206
231-0295 230-5300K 230-5800K 200-0206 200-0206
200-0206 = 5”Tension Pulley Assembly
200-0214 = 4”Tension Pulley Assembly
COMBINED FLUID PRODUCTS COMPANY
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