Dorner MPB Series User manual

851-492 Rev. B
Installation, Maintenance
& Parts Manual
MPB Series End Drive Conveyors
Table of Contents
Warnings – General Safety 2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Description 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Load vs Speed vs Conveyor Length Per Width 5. . . . . . . . .
Installation 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RequiredTools 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Installation Sequence 7. . . . . . . . . . . . . . . . .
Conveyors Up to 13 ft (3962 mm) 7. . . . . . . . . . . . . . . . . . .
Conveyors Longer Than 13 ft (3962 mm) 7. . . . . . . . . . . . .
Mounting Brackets 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Plastic Belt 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preventative Maintenance & Adjustment 10. . . . . . . . . . . . . . .
Required Tools 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Tools 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checklist 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintaining Conveyor Belt 10. . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conveyor Belt Replacement 10. . . . . . . . . . . . . . . . . . . . . . .
Conveyor Belt Replacement Sequence 10. . . . . . . . . . . . .
Belt Removal 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Belt Installation 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conveyor Belt Tensioning 12. . . . . . . . . . . . . . . . . . . . . . . . .
Pulley Removal 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A – Idler Pulley Removal 14. . . . . . . . . . . . . . . . . . . . . . .
B – Drive Pulley Removal 15. . . . . . . . . . . . . . . . . . . . . .
Bearing Removal & Replacement 16. . . . . . . . . . . . . . . . . . .
Pulley Replacement 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drive Pulley 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Idler Pulley 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Parts 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4” (102mm) and 6” (152mm) Wide Conveyor Assembly 22
12” (305mm) Conveyor Assembly 24. . . . . . . . . . . . . . . . . .
18” (457mm) to 24” (610mm) Wide Conveyor Assembly 28
Return Wear Strip Assembly–Under 3’ (914mm) Long 31. .
Return Wear Strip Assembly–Over 3’ (914mm) Long 32. . .
–04 3” (76mm) Aluminum Side 33. . . . . . . . . . . . . . . . . . . .
–05 1.5” (38mm) Aluminum Side 34. . . . . . . . . . . . . . . . . .
–13 Adjustable Guiding 36. . . . . . . . . . . . . . . . . . . . . . . . . .
2” (51mm) Cleated Guiding 37. . . . . . . . . . . . . . . . . . . . . . .
Flat Belt Mounting Bracket 38. . . . . . . . . . . . . . . . . . . . . . . .
Cleated Belt Mounting Bracket 38. . . . . . . . . . . . . . . . . . . . .
Flat Belt Mounting Brackets for 2’ (610mm)
Conveyors 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleated Belt Mounting Brackets for 2’ (610mm)
Conveyors 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Assembly without Stand Mount 40. . . . . . . . . .
Flat Belt Connecting Assembly with Stand Mount 40. . . . . .
Cleated Belt Connecting Assembly with Stand Mount 41. . .
Conveyor Belting 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Complete Conveyor Belt 42. . . . . . . . . . . . . . . . . . . . . . .
Belting Per 1ft (305mm) 42. . . . . . . . . . . . . . . . . . . . . . . .
Return Policy 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
851-492 Rev. B 2Dorner Mfg. Corp.
The safety alert symbol, black triangle with white
exclamation, is used to alert you to potential
personal injury hazards.
Ç
Ç
Ç
Ç
Climbing, sitting, walking or
riding on conveyor will
cause severe injury.
KEEP OFF CONVEYORS.
Ç
DO NOT OPERATE
CONVEYORS IN AN
EXPLOSIVE ENVIRONMENT.
Ç
Gearmotors may be HOT.
DO NOT TOUCH Gearmotors.
Ç
Exposed moving parts can
cause severe injury.
LOCK OUT POWER before
removing guards or
performing maintenance.
Ç
Ç
MPB Series Conveyors are
not reversible. Reversing
creates pinch points which
can cause severe injury.
DO NOT REVERSE MPB SE-
RIES CONVEYORS.
WARNING
Ç
For MPB Series Flat and
Cleated Belt Conveyors,
Top and Bottom Mount
Gearmotors must be
mounted as shown below.
Failure to do so creates
pinch points which can
cause severe injury.
WARNING
Flat Belt Bottom Mount Cleated Belt Top Mount
Ç
Dorner cannot control the
physical installation and
application of conveyors.
Taking protective measures
is the responsibility of the
user.
When conveyors are used in
conjunction with other
equipment or as part of a
multiple conveyor system,
CHECK FOR POTENTIAL
PINCH POINTS and other
mechanical hazards before
system start-up.
Ç
Loosening stand height or
angle adjustment screws
may cause conveyor
sections to drop down,
causing severe injury.
SUPPORT CONVEYOR
SECTIONS PRIOR TO
LOOSENING STAND
HEIGHT OR ANGLE
ADJUSTMENT SCREWS.
Warnings – General Safety

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
Dorner Mfg. Corp. 3851-492 Rev. B
IMPORTANT: Some illustrations may show
guards removed. DO NOT operate equipment with-
out guards.
Upon receipt of shipment:
DCompare shipment with packing slip. Contact factory
regarding discrepancies.
DInspect packages for shipping damage. Contact carrier
regarding damage.
DAccessories may be shipped loose. See accessory in-
structions for installation.
Dorner’s Limited Warranty applies.
Dorner MPB & 2200 series conveyors are covered by
Patent Numbers 5,174,435, 6,298,981 and correspond-
ing patents and patent applications in other countries.
Dorner reserves the right to make changes at any time
without notice or obligation.
Product Description
Refer to Figure 1 for typical conveyor components.
A Conveyor
B Gearmotor Mounting Package
C Gearmotor
D Guiding & Accessories
E Mounting Brackets
F Support Stand
H Drive End
I Idler/Tension End
Typical Components
Figure 1
A
B
C
D
E
E
I
F
H
Specifications
Models:
Flat Belt MPB Series Conveyor
Conveyor Width Reference
Conveyor Length Reference
Belt Type*
Output Shaft Position*
Conveyor Profile*
Bedplate Style: C = Closed
P = Perforated
Document Language, M = English
2P 0 M WW LLLL A PP BB
Stand Brackets: 0 = With required brackets
1 = Without required brackets
MPB Series Plastic Belt Conveyor
Cleated Belt MPB Series Conveyor
Conveyor Width Reference
Conveyor Length Reference
2P 2 M WW LLLL A BB SS
Output Shaft Position*
Cleat Spacing*
MPB Series Plastic Belt Conveyor
Document Language, M = English
Stand Brackets: 2 = With required brackets
3 = Without required brackets
Belt Type*
Bedplate Style: C = Closed
P = Perforated
* See Ordering and Specifications Catalog for details.
Introduction

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
851-492 Rev. B 4Dorner Mfg. Corp.
Conveyor Supports:
Maximum Distances:
J = 18¨(457 mm)**
K = 6 ft (1829 mm)***
L = 18¨(457 mm)
** For Heavy Load Bottom Mount Package, mount
support under gear head.
*** For conveyors longer than 13 ft (3962 mm), install
support at joint.
KJ L
Figure 2
Specifications:
Conveyor Width
Reference (WW) 04 06 12 18 24
Conveyor Belt Width 3.0¨
(76mm) 5.25¨ (133mm) 11.25¨ (286mm) 17.25¨ (438mm) 23.25¨
(591mm)
Conveyor Length
Reference (LL) 0200 to 3000 in 0002 increments
Conveyor Length 2 ft (610mm) to 30 ft (9144mm) in 0.24”(6mm) increments
Belt Travel 8.1¨(209 mm) per revolution of pulley
Maximum Belt Speed* 250 ft/minute (76.2 m/minute) for flat belt models
150 ft/minute (45.7 m/minute) for cleated belt models
Belt Takeup 1.5¨ (38 mm) of stroke = 3¨(76 mm) of belt take-up
No Load Torque
NOTES:
1. No Load torques are for Flat Belt conveyors only.
For No Load torques on Cleated and Sidewall
Cleated Conveyors contact the factory.
2. The torque required to overcome the conveyor’s
initial startup inertia may temporarily exceed the av-
erage “no load”torque by a factor of 2 to 3 times.
3. Stated torques are average values based on Dorn-
er standard belts running at 50’(15meters) per min-
ute.
SpecificationsSpecifications

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
Dorner Mfg. Corp. 5851-492 Rev. B
No Load Torque Data Width
Length 3.0”(76mm) 5.25”(133mm) 11.25”(286mm) 17.25“(438mm) 23.25”(591mm)
(feet) in–lbs N–m in–lbs N–m in–lbs N–m in–lbs N–m in–lbs N–m
2 5 0.6 6 0.6 6 0.7 7 0.8 7 0.8
350.6 6 0.7 7 0.8 8 0.9 8 1.0
4 6 0.6 6 0.7 7 0.8 8 1.0 10 1.1
5 6 0.7 6 0.7 8 0.9 9 1.0 11 1.2
6 6 0.7 7 0.7 8 0.9 10 1.1 12 1.3
7 6 0.7 7 0.8 9 1.0 11 1.2 13 1.5
8 6 0.7 7 0.8 9 1.1 12 1.3 14 1.6
9 6 0.7 7 0.8 10 1.1 13 1.4 15 1.7
10 7 0.7 8 0.9 11 1.2 14 1.5 16 1.9
11 7 0.8 8 0.9 11 1.3 14 1.6 18 2.0
12 7 0.8 8 0.9 12 1.3 15 1.7 19 2.1
13 7 0.8 8 0.9 12 1.4 16 1.8 20 2.3
14 7 0.8 9 1.0 13 1.4 17 1.9 21 2.4
15 7 0.8 9 1.0 13 1.5 18 2.0 22 2.5
16 8 0.9 9 1.0 14 1.6 19 2.1 23 2.6
17 8 0.9 9 1.1 14 1.6 19 2.2 25 2.8
18 8 0.9 10 1.1 15 1.7 20 2.3 26 2.9
19 8 0.9 10 1.1 16 1.8 21 2.4 27 3.0
20 8 0.9 10 1.2 16 1.8 22 2.5 28 3.2
21 8 0.9 10 1.2 17 1.9 23 2.6 29 3.3
22 9 1.0 11 1.2 17 1.9 24 2.7 30 3.4
23 9 1.0 11 1.2 18 2.0 25 2.8 31 3.6
24 9 1.0 11 1.3 18 2.1 25 2.9 33 3.7
25 9 1.0 11 1.3 19 2.1 26 3.0 34 3.8
26 9 1.0 12 1.3 19 2.2 27 3.1 35 3.9
27 9 1.1 12 1.4 20 2.3 28 3.2 36 4.1
28 9 1.1 12 1.4 21 2.3 29 3.3 37 4.2
29 10 1.1 13 1.4 21 2.4 30 3.4 38 4.3
30 10 1.1 13 1.4 22 2.5 31 3.5 39 4.5
Load vs. Speed vs Conveyor Length Per Width
NOTE: Maximum conveyor loads based on:
DNon-accumulating product
DProduct moving towards gearmotor
DConveyor being mounted horizontal
Load
(lbs)
3.0”Wide
Conveyor
Belt Speed (Ft/min)
30’
20’
15’
10’
6’
3’
SpecificationsSpecifications

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
851-492 Rev. B 6Dorner Mfg. Corp.
Load
(lbs)
Belt Speed (Ft/min)
30’
20’
15’
10’
6’
3’
5.25”Wide
Conveyor
30’
20’
15’
10’
6’
3’
Belt Speed (Ft/min)
Load
(lbs)
11.25”Wide
Conveyor
30’
20’
15’
10’
6’
3’
Belt Speed (Ft/min)
Load
(lbs)
17.25”Wide
Conveyor
30’20’
15’
10’
6’
3’
Belt Speed (Ft/min)
Load
(lbs)
23.25”Wide
Conveyor
Specifications

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
Dorner Mfg. Corp. 7851-492 Rev. B
Ç
MPB Series Conveyors are
not reversible. Reversing
creates pinch points which
can cause severe injury.
DO NOT REVERSE MPB SE-
RIES CONVEYORS.
WARNING
Ç
For MPB Series Flat and
Cleated Belt Conveyors,
Top and Bottom Mount
Gearmotors must be
mounted as shown below.
Failure to do so creates
pinch points which can
cause severe injury.
WARNING
Flat Belt Bottom Mount Cleated Belt Top Mount
NOTE: Conveyor MUST be mounted straight, flat
and level within confines of conveyor. Use a level
(M of Figure 3) for setup.
Figure 3
M
Required Tools
DHex-key wrenches:
4 mm, 5 mm
DLevel
DTorque wrench
D3/32”(2.4 mm) wide Flat Blade screwdriver
Recommended Installation Sequence
DInstall support stands (see accessory instructions)
DAssemble conveyor frame(if required)(page 7)
DAttach mounting brackets to conveyor frame and
stands (page 8)
DInstall Belt (page 9)
DMount gearmotor mounting package (see accessory
instructions)
DAttach guides/accessories (see page 33 through 37 of
“Service Parts”section for details)
Conveyors Up to 13 ft (3962 mm)
No assembly is required. Install mounting brackets.
Refer to “Mounting Brackets”on page 8.
Conveyors Longer Than 13 ft (3962 mm)
NOTE:Conveyors shipped in multiple sections will
have a return wearstrip extending from the end of the
conveyor. See Figure 4.
Figure 4
1.Locate conveyor sections (N Figure 5)
Figure 5
N
N
Installation

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
851-492 Rev. B 8Dorner Mfg. Corp.
2.Join conveyor sections and install connector brack-
ets (O of Figure 6) or connector/mount brackets (Q)
and screws (P) on both sides as indicated.
Figure 6
O
PQ
P
3.Snap the protruding return wear strip to the extrusion
on the opposite side (R of Figure 7).
Figure 7
R
4.Tighten screw (P of Figure 6) to 60in–lb (7 N–m) on
both sides of conveyor.
Mounting Brackets
1.Locate brackets. Exploded views shown in Fig-
ures 8 & 9.
Figure 8
S
W
V
U
T
Mounting Brackets for Flat Belt Conveyor
Figure 9
SW
V
U
T
Mounting Brackets for Cleated Belt Conveyor
2.Remove screws (S & T of Figures 8 & 9), washers
(U), nuts (V) and T-bars (W) from brackets.
3.Insert T-bars (W of Figures 8 & 9) into conveyor side
slots (X of Figure 10). Fasten brackets (Y of Figure
10) to conveyor with mounting screws (S).
Figure 10
U
T
X
S
Y
V
NOTE: Mounting brackets for flat belt conveyors
shown.
4.Fasten brackets to support stand with mounting
screws (T of Figure 10), washers (U) and nuts (V).
5.Tighten screws (S & T of Figure 10) to 60 in-lb
(7 N–m).
InstallationInstallationInstallation

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
Dorner Mfg. Corp. 9851-492 Rev. B
Installing Plastic Belt
NOTE: 17.25”and 23.25”wide plastic belt will cor-
rectly operate in one direction only. Ensure the belt
is installed in the correct orientation. Refer to step
2 below for details.
1.Locate the conveyor belt retaining rod (Z of Figure
11) and belt end caps (AA).
Figure 11
Z
AA
2.For 17.25”wide and 23.25”wide belts, align the belt
to the retained center sprocket(AB of Figure 12) on
the drive end of the conveyor.
Figure 12
AC
AD
AB
3.Feed belt into bottom wear strips (AE of Figure 13)
and pull through to the far end.
Figure 13
AE
4.Aligning free moving sprocket(s)(AC of figure 12)
to the drive pocket(s)(AD). Wrap belt around
sprockets and pull towards idler end.
5.Repeat step 4 for the idler end of conveyor.
6.Splice the belt together by pushing the plastic rod
(AF of Figure 14) through the side hole.
Figure 14
AF
7.Insert rod retaining end caps (AG of figure 15) on
both sides of belt.
Figure 15
AG
8.See “Conveyor Belt Tensioning”section on page 12
for details on belt tension.
InstallationInstallation

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
851-492 Rev. B 10 Dorner Mfg. Corp.
Required Tools
Standard Tools
DHex-key wrenches:
2.5 mm, 4 mm, 5 mm
D3/32”(2.4 mm) wide Flat Blade screw driver
DArbor press
DAdjustable wrench to 1”(25 mm) wide
Special Tools
D807–1078 Sealed Bearing Removal Tool
D450292 Sealed Bearing Installation Tool
Checklist
DKeep service parts on hand (see “Service Parts”sec-
tion for recommendations)
DKeep supply of belt cleaner (part # 625619)
DClean entire conveyor while disassembled
DReplace worn or damaged parts
Lubrication
No lubrication is required. Replace bearings if worn.
Maintaining Conveyor Belt
Troubleshooting
Inspect conveyor belt for:
DSurface cuts or wear
DTooth skipping
DLoose links
Surface cuts and wear indicate:
DSharp or heavy parts impacting belt
DJammed parts
DForeign material inside the conveyor
DImproperly positioned accessories
DBolt-on guiding is pinching belt
Stalling or skipping belt indicates:
DBelt stretching
DConveyor belt or drive timing belt are not properly
tensioned
DWorn sprocket or impacted dirt on drive pulley
DIntermittent jamming or drive train problems
NOTE: Visit www.dorner.com for complete list of
troubleshooting solutions.
Cleaning
IMPORTANT: Do not use belt cleaners that con-
tain alcohol, acetone, Methyl Ethyl Ketone (MEK) or
other harsh chemicals.
Use Dorner Belt Cleaner (part # 625619). Mild soap and
water may also be used. Do not soak the belt.
Conveyor Belt Replacement
Ç
Ç
Exposed moving parts can
cause severe injury.
LOCK OUT POWER before
removing guards or
performing maintenance.
Conveyor Belt Replacement Sequence
DRemove old conveyor belt
DInstall new conveyor belt
DTension conveyor belt
Belt Removal
1.On idler end of the conveyor identified with a
label (AH of figure 16), loosen fastening
screws (AI of figure 16) on both sides of conveyor.
Push head plate assembly (AJ) inward.
Figure 16
AH
AI
AJ
Preventive Maintenance and Adjustment

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
Dorner Mfg. Corp. 11 851-492 Rev. B
2.Choose one link on the idler end of chain to remove
endcaps. With a 3/32”(2.4 mm) flat blade screw-
driver, pry under tab of end caps (AK of Figure 17)
and remove end cap. Repeat for opposite side of
conveyor.
Figure 17
AK
3.Insert screwdriver (AL of figure 18) into one side of
belt, pushing rod (AM) out. Remove rod and
separate belt.
Figure 18
AM
AL
4.Pull back topside of belt to the drive end of the
conveyor. See figure 19.
Figure 19
5.Remove belt by pulling belt out of bottom wear
strips. See figure 20.
Figure 20
Belt Installation
1.See “Installing Plastic Belt”page 9.
Preventive Maintenance and Adjustment

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
851-492 Rev. B 12 Dorner Mfg. Corp.
Conveyor Belt Tensioning
Ç
Exposed moving parts can
cause severe injury.
LOCK OUT POWER before
removing guards or
performing maintenance.
NOTE:The MPB Series Plastic Belt Conveyor is de-
signed to operate with minimal belt tension. The belt
sag guard (AN of figure 21) provides information to
the proper belt tension. Figure 21 indicates mini-
mum belt sag. Figure 22 indicates maximum belt
sag. Belt sag beyond that indicated in Figure 22 must
be tensioned see below for details.
Figure 21
AN
Figure 22
Ç
Operating conveyor with
belt sag beyond maximum
shown in figure 22 will
create belt pinch points
which can cause injury.
TENSION CONVEYOR BELT
IF MAXIMUM SAG IS
REACHED
Belt tensioning may be done by two methods:
DA–Extending idler end
DB–Removal of belt links
A–Extending Idler End
1.On tension end of the conveyor, identified with a
label (AH of Figure 23), on both sides of
conveyor, loosen fastening screws (AI). Insert 5mm
Hex wrench into pinion gear (AO) and rotate to
extend head plate assembly(AH).
Figure 23
AH
AI
AJ
AO
2.Extend head plate assembly so belt sag is between
minimum shown in figure 21 and maximum shown
in figure 22. If proper tensioning cannot be obtained
before (AP of Figure 24) is even with the end of the
conveyor frame (AQ), belt links must then be
removed. See section “B Removal of Belt Links”.
Figure 24
AQ AP
Preventive Maintenance and Adjustment

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
Dorner Mfg. Corp. 13 851-492 Rev. B
3.After adjusting proper tensioning, tighten fastening
screws (AI of Figure 23) on both sides of conveyor
to 60 in-lb (7 N–m).
B–Removal of Belt Links
1.Choose one link on the idler end of chain to remove
endcaps. With a 3/32”(2.4 mm) flat blade screw-
driver, pry under tab of end caps (AK of Figure 25)
and remove end cap. Repeat for opposite side of
conveyor.
Figure 25
AK
2.Insert screwdriver (AR of figure 26) into one side of
belt, pushing rod (AS) out. Remove rod and separate
belt.
Figure 26
AS
AR
3.Determine the number of links to be removed. Start
with 1 link and progress if additional tensioning is
required repeat steps 1 and 2.
4.Splice the belt together by pushing the plastic rod
(AF of Figure 27) through the side hole.
Figure 27
AF
5.Insert rod retaining end caps (AG of figure 28) on
both sides of belt.
Figure 28
AG
6.Review belt sag at drive end to ensure it is between
minimum shown in figure 21 and maximum shown
in figure 22. If additional tensioning is required
repeat steps 1 through 5.
Preventive Maintenance and Adjustment

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
851-492 Rev. B 14 Dorner Mfg. Corp.
Pulley and Sprockets Removal
Ç
Exposed moving parts can
cause severe injury.
LOCK OUT POWER before
removing guards or
performing maintenance.
Remove conveyor belt to access pulley(s). See “Convey-
or Belt Replacement”on page 10. Remove the desired
pulley following the corresponding instructions below:
DA–Idler Pulley and Sprockets Removal
DB–Drive Pulley and Sprockets Removal
A–Idler Pulley and Sprockets Removal
1.On both sides of conveyor, loosen two (2) fastening
screws (AI of Figure 29). Then slide idler pulley
assembly out from the conveyor frame.
Figure 29
AI
2.Remove bearing covers (AT of Figure 30).
Figure 30
AT
3.With 4mm hex-key wrench, loosen pulley taper
screw (AU of Figure 31). Steady pulley (AV) with
adjustable wrench (AW). Repeat procedure for
opposite side of pulley.
Figure 31
AU
AV
AW
4.Remove head plates with bearings from the pulley.
5.Slide idler end guard (AX of Figure 32)from ends of
pulley (AY).
Figure 32
AY AX
6.Slide free moving sprocket(s) (AZ of Figure 33) off
the end of pulley (BA).
Figure 33
BA
AZ
Preventive Maintenance and Adjustment

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
Dorner Mfg. Corp. 15 851-492 Rev. B
7.Remove snap rings (BB of Figure 34). Slide drive
sprocket (BC) off the end of pulley (BD).
Figure 34
BD
BC
BB
B–Drive Pulley and Sprockets Removal
Ç
Ç
Drive shaft keyway may be
sharp.
HANDLE WITH CARE.
1.On both sides of conveyor, loosen two (2) fastening
screws (BE of Figure 35). Then slide drive pulley
assembly out from the conveyor frame.
Figure 35
BE
2.Remove bearing cover (AT of Figure 36) from side
opposite of drive shaft.
Figure 36
AT
3.On side opposite of drive shaft, loosen pulley taper
screw (AU of Figure 37) with 4mm hex-key wrench.
Steady pulley (AV) with adjustable wrench (AW).
Figure 37
AU
AV
AW
4.On side opposite of drive shaft, pull head plate with
bearings off from the pulley.
5.With bearing removal tool, (BF of Figure 38), part
number 807–1078, remove head plate from drive
shaft side of pulley. Connect tool jaws at indicated
points (BG).
Figure 38
BF
BG
BG
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MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
851-492 Rev. B 16 Dorner Mfg. Corp.
6.Slide free moving sprocket(s) (AZ of Figure 39) off
the end of pulley (BA).
Figure 39
BA
AZ
7.Remove snap rings (BB of Figure 40). Slide drive
sprocket (BC) off the end of pulley (BD).
Figure 40
BD
BC
BB
Bearing Removal & Replacement
Ç
Exposed moving parts can
cause severe injury.
LOCK OUT POWER before
removing guards or
performing maintenance.
Ç
Drive shaft keyway may be
sharp.
HANDLE WITH CARE.
Removal
1.Remove idler pulley or drive pulley. For idler pulley
see section “A –Idler Pulley and Sprockets Remov-
al”, steps 1 through 4. For drive pulley see section “B
–Drive Pulley and Sprockets Removal”, steps 1
through 5.
2.For drive end head plates, remove screw (BH of
Figure 41) and remove belt sag guard (BI).
Figure 41
BI
BH
3.Turn bearing (BJ of Figure 42) to align with slots
(BK) in head plate. Then remove bearing.
Figure 42
BJ
BK
Preventive Maintenance and Adjustment

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
Dorner Mfg. Corp. 17 851-492 Rev. B
Replacement
1.Inspect head plate bearing surface. If worn or
damaged, replace head plate. See “Service Parts”on
page 22.
2.Insert bearing (BJ of Figure 43) into head plate slot
and twist bearing to fit into bearing enclosure.
Figure 43
BJ
Pulley and Sprockets Replacement
Drive Pulley and Sprockets
1.Install sag guard (BI of Figure 44) to headplate (BL)
with screw (BH). Repeat for opposite headplate.
Figure 44
BI
BH
BL
2.Install drive sprocket (BC of Figure 45) with snap
rings (BB) to pulley (BD).
Figure 45
BD
BC
BB
3.As required, install free moving sprockets as per
Figure 46, items in bold are the fixed drive sprockets.
4”
6”
12”
18”
24”
6”
8 1/4”
Figure 46
4.With bearing installed in head plate, use a bearing
installation tool, (BM of Figure 47), part number
450292, to press the bearing onto the drive shaft.
Figure 47
BM
Preventive Maintenance and Adjustment

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
851-492 Rev. B 18 Dorner Mfg. Corp.
5.With bearing installed in head plate, press bearing on
to non-drive shaft (BN of Figure 48) of pulley.
Figure 48
BN
NOTE: DO NOT tighten non-drive shaft bearing ta-
per screws at this time.
6.Install pulley assembly on conveyor. On both sides
of conveyor tighten fastening screws (BE of Figure
49) to 60 in-lb (7 N–m).
Figure 49
BE
7.With 4mm hex-key wrench, tighten pulley taper
screw (AU of Figure 50) to 75 in-lb (8.5 N–m).
Steady pulley (AV) with wrench (AW).
Figure 50
AU
AV
AW
8.Install bearing cover (AT of Figure 51).
Figure 51
AT
Idler Pulley and Sprockets
1.Install drive sprocket (BC of Figure 45) with snap
rings (BB) to pulley (BD).
Figure 52
BD
BC
BB
Preventive Maintenance and Adjustment

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
Dorner Mfg. Corp. 19 851-492 Rev. B
2.As required, install free moving sprockets as per
Figure 53, items in bold are the fixed drive sprockets.
4”
6”
12”
18”
24”
6”
8 1/4”
Figure 53
3.Install idler guard (BO of Figure 54) on the end of
pulley (BN). With bearing installed in head plate,
press bearing on to shaft (BN) of pulley.
Figure 54
BN
BO
NOTE: DO NOT tighten shaft bearing taper screws
at this time.
4.Repeat step 1 on opposite side of pulley.
5.Install pulley assembly on conveyor. On both sides
of conveyor, tighten screws (BE of Figure 55) to 60
in–lb (7 N–m).
Figure 55
BE
6.On both sides of pulley, use a 4mm hex-key wrench
to tighten pulley taper screw (AU of Figure 56) to 75
in-lb (8.5 N–m). Steady pulley (AV) with wrench
(AW).
Figure 56
AU
AV
AW
7.Install bearing covers (AT of Figure 57).
Figure 57
AT
Preventive Maintenance and Adjustment

MPB Series End Drive Conveyor Installation, Maintenance & Parts Manual
851-492 Rev. B 20 Dorner Mfg. Corp.
Upper Wear Strip Replacement
Ç
Exposed moving parts can
cause severe injury.
LOCK OUT POWER before
removing guards or
performing maintenance.
1.Remove conveyor belt. See “Belt Removal”section
on page 10.
2.With a T–20 Torx head wrench, remove screw (BP
of Figure 58) and bushings (BQ). Remove old wear
strip.
Figure 58
BQ
BP
Figure 59
3.Install new wear strip, with bushings (BQ) and
screws (BP). Tighten screws to 25 in–lb (2.8 N–m).
Figure 60
BQ
BP
Return Wear Strip Replacement
Ç
Exposed moving parts can
cause severe injury.
LOCK OUT POWER before
removing guards or
performing maintenance.
1.Remove old wear strip (BR) by sliding off of support
extrusion (BS of Figure 61).
Figure 61
BS
BR
2.Install new wearstrip onto support extrusion (BS).
Figure 62
BS
Preventive Maintenance and Adjustment