Dorner 2700 Series User manual

851-978 Rev. A
For other service manuals visit our website at:
www.dornerconveyors.com/manuals-literature
Record Conveyor Serial Number Here
2700 Series Conveyors
Installation, Maintenance & Parts Manual
Mid Drive End Drive

Dorner Mfg. Corp. 2 851-978 Rev. A
2700 Series Conveyors
Table of Contents
Introduction ......................................................................... 3
Warnings −General Safety ................................................. 4
Product Description ............................................................. 5
Specifications ...................................................................... 5
Models: ............................................................................ 5
Flat Belt 2700 Series End Drive Conveyor .................. 5
Flat Belt 2700 Series iDrive Conveyor ........................ 5
Flat Belt 2700 Series Mid Drive Conveyor.................. 6
Conveyor Supports .......................................................... 6
End Drive and iDrive Conveyor Supports ................... 6
Maximum Distances: ................................................ 6
Mid Drive Conveyor Supports ..................................... 6
Maximum Distances: ................................................ 6
End/Mid Drive Conveyor Specifications......................... 7
iDrive Conveyor Specifications....................................... 7
iDrive Motor Specifications............................................. 8
Fastener Torque Specifications........................................ 8
Installation ........................................................................... 9
Required Tools................................................................. 9
Recommended Installation Sequence .............................. 9
Conveyors Up to 12 ft (3658 mm)................................... 9
Conveyors Longer Than 12 ft (3658 mm) ....................... 9
Mounting Brackets......................................................... 11
Return Rollers ................................................................ 12
iDrive Wiring................................................................. 12
Guide Clips .................................................................... 13
Adjustable Guides.......................................................... 13
Preventive Maintenance and Adjustment.......................... 15
Required Tools............................................................... 15
Standard Tools............................................................ 15
Checklist ........................................................................ 15
Lubrication..................................................................... 15
Maintaining Conveyor Belt ........................................... 15
Troubleshooting ......................................................... 15
Cleaning ..................................................................... 15
Conveyor Belt Replacement .......................................... 15
Conveyor Belt Replacement Sequence ...................... 15
Belt Removal for End Drive and iDrive Conveyors .. 16
Belt Removal for Mid Drive Conveyors .................... 17
Belt Installation for End Drive
and iDrive Conveyors................................................. 18
Conveyor Belt Tensioning ............................................. 19
Conveyor Belt Tracking................................................. 20
V-Guided Belts........................................................... 20
Non V-Guided Belts................................................... 20
End Drive Conveyor Belts ......................................... 20
Pulley Replacement ....................................................... 21
A −Drive Pulley Removal ......................................... 21
B −iDrive Pulley Removal ........................................ 22
C −Idler Pulley Removal........................................... 24
D −5/8" (16 mm) Nosebar Pulley Removal .............. 25
E −Mid Drive Module Pulley Removal .................... 27
iDrive Motor Replacement ............................................ 29
Pinion Replacement ....................................................... 31
Service Parts....................................................................... 35
End Drive Tail ................................................................ 35
iDrive Tail ...................................................................... 36
Idler Tail ......................................................................... 37
5/8" (16 mm) Nosebar Tail............................................. 38
Mid Drive Module.......................................................... 39
Frame Assembly............................................................. 40
#04 Profile - 3.00" (76 mm) Aluminum Side................. 41
#05 Profile - 1.50" (38 mm) Aluminum Side................. 42
#07 Profile - Low to Side Wiper .................................... 43
#09 Profile - Low to High Side ...................................... 44
#10 Profile - 0.5" (13 mm) Extruded Plastic Side.......... 45
#13, 33 & 43 Profile - Adjustable Guiding .................... 46
#14, 34 & 44 Profile - Tool-Less Adjustable Guiding ... 47
#16, 36 & 46 Profile - Outboard Adjustable Guiding .... 48
#19, 39 & 49 Profile - Horizontal Adjustable Guiding .. 49
#20, 40 & 50 Profile - Tool-Less
Horizontal Adjustable Guiding ...................................... 50
Mounting Brackets ......................................................... 51
Mounting Brackets Assembled to the Tail ..................... 52
Connecting Assembly without Stand Mount.................. 53
Connecting Assembly with Stand Mount....................... 53
Return Roller .................................................................. 54
Conveyor Belt Part Number Configuration.................... 55
Return Policy...................................................................... 56

851-978 Rev. A 3 Dorner Mfg. Corp.
2700 Series Conveyors
Introduction
Upon receipt of shipment:
• Compare shipment with packing slip. Contact factory
regarding discrepancies.
• Inspect packages for shipping damage. Contact carrier
regarding damage.
• Accessories may be shipped loose. See accessory instruc-
tions for installation.
Dorner’s Limited Warranty applies.
Dorner has convenient, pre−configured kits of Key Service
Parts for all conveyor products. These time saving kits are
easy to order, designed for fast installation, and guarantee
you will have what you need when you need it. Key Parts
and Kits are marked in the Service Parts section of this
manual with the Performance Parts Kits logo .
Dorner reserves the right to make changes at any time
without notice or obligation.
IMPORTANT
Some illustrations may show guards removed.
DO NOT operate equipment without guards.

Dorner Mfg. Corp. 4 851-978 Rev. A
2700 Series Conveyors
Warnings −General Safety
A
WARNING
The safety alert symbol, black triangle with white
exclamation, is used to alert you to potential
personal injury hazards.
A
DANGER
SEVERE HAZARD!
KEEP OFF CONVEYORS. Climbing, sitting, walking
or riding on conveyor will result in death or serious
injury.
A
WARNING
SEVERE HAZARD!
LOCK OUT POWER before removing guards or
performing maintenance. Exposed moving parts
can cause serious injury.
A
WARNING
BURN HAZARD!
DO NOT TOUCH the motor while operating, or
shortly after being turned off. Motors may be HOT
and can cause serious burn injuries.
A
WARNING
PUNCTURE HAZARD!
Handle drive shaft keyway with care. It may be
sharp and could puncture the skin, causing serious
injury.
A
DANGER
EXPLOSION HAZARD!
• DO NOT OPERATE CONVEYORS IN AN
EXPLOSIVE ENVIRONMENT. The electric
gearmotor generates heat and could ignite
combustible vapors.
• Failure to comply will result in death or serious
injury.
A
WARNING
CRUSH HAZARD!
•DO NOT place hands or fingers inside the
conveyor while it is running.
• DO NOT wear loose garments while operating the
conveyor. Loose garments can become caught up
in the conveyor.
•Failure to comply could result in serious injury.
A
WARNING
CRUSH HAZARD!
•SUPPORT CONVEYOR SECTIONS PRIOR TO
LOOSENING STAND HEIGHT OR ANGLE
ADJUSTMENT SCREWS.
•Loosening stand height or angle adjustment
screws may cause conveyor sections to drop
down, causing serious injury.
A
WARNING
SEVERE HAZARD!
•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.
•Failure to comply could result in serious injury.

851-978 Rev. A 5 Dorner Mfg. Corp.
2700 Series Conveyors
Product Description
Typical Conveyor Components:
Figure 1
Figure 1
Specifications
Models:
Flat Belt 2700 Series End Drive Conveyor Flat Belt 2700 Series iDrive Conveyor
1 Conveyor
2 Gearmotor Mounting Package
3 Gearmotor
4 Guiding & Accessories
5 Mounting Brackets
6 Return Rollers
7 Support Stand
8 Variable Speed Controller
9DriveEnd
10 Idler/Tension End
1
6
9
5
8
4
3
2
7
10
5
Conveyor Length
V-Guide / Mounting Brackets
Idler Tail Type
Shaft Position
Conveyor Width
2LED M WW LLLL V PA BB
Document Language
Profile (A side)
PD -
I D
Profile (D side)
Belt Type
-X1234
Tail 4 Auxiliary
Tail 3 Auxiliary
Shaft Option
Tail 2 Auxiliary
Shaft Option
Tail 1 Auxiliary
Shaft Option
Auxiliary Shaft Exists
Shaft Option
Conveyor Length
V-Guide / Mounting
Idler Tail Type
Shaft Position
Conveyor Width
2LED M WW LLLL V PA BB
Document Language
Profile (A side)
PD -
I D
Profile (D side)
Belt Type
-FDCPS
iDrive Type

Dorner Mfg. Corp. 6 851-978 Rev. A
2700 Series Conveyors
Specifications
Flat Belt 2700 Series Mid Drive Conveyor
See Engineering manual for details.
Conveyor Supports
End Drive and iDrive Conveyor Supports
Maximum Distances:
1 = 24" (610 mm)
2 = 18" (457 mm)
3 = 96" (2438 mm)
Figure 2
Figure 2
Mid Drive Conveyor Supports
Maximum Distances:
1 = 24" (610 mm) (Idler End)
2 = 96" (2438 mm)**
** For conveyors longer than 12 ft (3658 mm), install
support at joint.
Figure 3
Figure 3
Conveyor Length
V-Guide / Mounting Brackets
Tension Tail Type
Shaft Position
Conveyor Width
2L MD M WW LLLL V PA BB
Document Language
Profile (A side)
PD -
I D
Profile (D side)
Belt Type
-X1234
Tail 4 Auxiliary
Shaft Option
Tail 3 Auxiliary
Shaft Option
Tail 2 Auxiliary
Shaft Option
Tail 1 Auxiliary
Shaft Option
Auxiliary Shaft Exists
E
Fixed Tail Type
Mid Drive Type
12
3
112

851-978 Rev. A 7 Dorner Mfg. Corp.
2700 Series Conveyors
Specifications
End/Mid Drive Conveyor Specifications
* See Engineering manual for details.
iDrive Conveyor Specifications
* See Engineering manual for details.
Conveyor Width Reference (WW) 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36
Conveyor Belt Width 10" (254 mm), 12" (305 mm), 14" (356 mm), 16" (406 mm), 18" (457 mm), 20" (508 mm),
22" (559 mm), 24" (609 mm), 26" (660 mm), 28" (711 mm), 30" (762 mm), 32" (813 mm),
34" (864 mm), 36" (914 mm)
Maximum Belt Speed* 400 ft/minute (122 m/minute)
Maximum Conveyor Load*
(See NOTE Below) 150 lbs (68 kg)
Belt Travel 7.4"(189 mm) per revolution of pulley
End Drive Conveyor Length Reference (LLLL) 0170 to 2400 in 001 increments
End Drive Conveyor Length 1.70 ft (508 mm) to 24 ft (7,315 mm) in 0.12"(3 mm) increments
Mid Drive Conveyor Length Reference (LLLL)0200 to 1800 in 001 increments
Mid Drive Conveyor Length 2 ft (610 mm) to 18 ft (5,486 mm) in 0.12"(3 mm) increments
Belt Take-up 0.38"(9.5 mm) of stroke = 1.1"(28 mm) of belt take-up
Conveyor Width Reference (WW) 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36
Conveyor Belt Width 10" (254 mm), 12" (305 mm), 14" (356 mm), 16" (406 mm), 18" (457 mm), 20" (508 mm), 22" (559 mm),
24" (609 mm), 26" (660 mm), 28" (711 mm), 30" (762 mm), 32" (813 mm), 34" (864 mm), 36" (914 mm)
Speed Range 3.3 to 33 ft/
minute (1 to 10
m/minute)
4.9 to 49 ft/
minute 1.5 to 15
m/minute)
6.6 to 66 ft/
minute (2 to 20
m/minute)
8.2 to 82 ft/
minute (2.5 to 25
m/minute)
14.8 to 148 ft/
minute (4.5 to 45
m/minute)
20 to 200 ft/
minute (6.1 to 61
m/minute)
Maximum Conveyor Load*
(See NOTE Below) 165 lbs (75 kg) 108 lbs (49 kg) 75 lbs (34 kg) 59 lbs (27 kg) 26 lbs (12 kg) 15 lbs (7 kg)
Belt Travel 7.4"(189 mm) per revolution of pulley
Conveyor Length Reference (LLLL)0170 to 1000 in 001 increments
Conveyor Length 1.70 ft (508 mm) to 10 ft (3,048 mm) in 0.12"(3 mm) increments
Belt Take-up 0.38"(9.5 mm) of stroke = 0.71"(18 mm) of belt take-up
NOTE
Maximum conveyor loads are based on:
• Non-accumulating product
• Product moving toward gearmotor
• Conveyor being mounted horizontally
• Conveyor being located in a dry environment
• Conveyor equipped with standard belt only

Dorner Mfg. Corp. 8 851-978 Rev. A
2700 Series Conveyors
Specifications
iDrive Motor Specifications
Fastener Torque Specifications
Voltage 24 Volt DC
Output Power 40 watt
Rated Current 2.5 amp
Starting Current 3.0 amp
Ambient Temperature 14° ~ 104° F (-10° ~ 40° C) (No Condensation)
Duty Cycle 0.5 sec ON / 0.50 sec OFF Minimum
Operation Load/Current without Overheating
Gearmotor Ratios Belt Speed
11:1 20.1-201 fpm (6.1-61 mpm)
15:1 14.7-147 fpm (4.5-45 mpm)
18:1 12-120 fpm (3.7-37 mpm)
27:1 8.2-82 fpm (2.5-25 mpm)
33:1 6.7-67 fpm (2.0-20 mpm)
45:1 4.9-49 fpm (1.5-15 mpm
67:1 3.3-33 fpm (1.0-10 mpm)
Flat Head Socket Head Button/Low Head Set Screw
Size Torque Size Torque Size Torque Size Torque
M4 x 0.7 2.5 mm 3.4 Nm
(30 in lbs)
3 mm 5.9 Nm
(52 in lbs)
2.5 mm 2.9 Nm
(26 in lbs)
2 mm 2.1 Nm
(19 in lbs)
M5 x 0.8 3 mm 6.9 Nm
(61 in lbs)
4 mm 12.0 Nm
(106 in lbs)
3 mm 5.9 Nm
(52 in lbs)
2.5 mm 4.7 Nm
(42 in lbs)
M6 x 1.0 4 mm 12.0 Nm
(106 in lbs)
5 mm 20.3 Nm
(180 in lbs)
4 mm 10.0 Nm
(89 in lbs)
3 mm 7.7 Nm
(68 in lbs)
M8 x 1.25 5 mm 28.0 Nm
(248 in lbs)
6 mm 48.8 Nm
(432 in lbs)
5 mm 24.0 Nm
(212 in lbs)
4 mm 17.8 Nm
(158 in lbs)
M10 x 1.5 6 mm 56.0 Nm
(496 in lbs)
8 mm 97.5 Nm
(863 in lbs)
6 mm 48.0 Nm
(425 in lbs)
5 mm 35.0 Nm
(310 in lbs)

851-978 Rev. A 9 Dorner Mfg. Corp.
2700 Series Conveyors
Installation
Figure 4
Figure 4
Required Tools
• Hex-key wrenches: 3 mm, 4 mm, 5 mm
• Level
• Torque wrench
Recommended Installation
Sequence
• Assemble conveyor (if required)
• Attach mounting brackets to conveyor
• Attach conveyor to stands
• Install return rollers on conveyor (optional)
• Mount gearmotor mounting package
(See Gearmotor Mounting Package manual.)
• Attach guides/accessories.
Conveyors Up to 12 ft (3658 mm)
No assembly is required. Install mounting brackets and
return rollers. Refer to “Mounting Brackets” on page 11 and
“Return Rollers” on page 12.
Conveyors Longer Than 12 ft
(3658 mm)
1. Locate and arrange conveyor sections by section labels
(Figure 5, item 1).
Figure 5
Figure 5
2. Follow the corresponding instructions below:
a. Idler Tail
b. End Drive Tail
c. iDrive Tail
a. On idler end of conveyor, identified with a
label (Figure 6, item 1), push in head
plate assembly (Figure 6, item 2):
•On both sides of conveyor, loosen and move cam
tracking assemblies (Figure 6, item 3) (if
equipped) away from head plates.
•Loosen fastening screws (Figure 6, item 4) and
push head plate assembly inward.
Figure 6
Figure 6
NOTE
Conveyor MUST be mounted straight, flat,
and level within confines of conveyor. Use a
level (Figure 4, item 1) for setup.
1
1
1
3
1
4
2

Dorner Mfg. Corp. 10 851-978 Rev. A
2700 Series Conveyors
Installation
b. On end drive of the conveyor, push in head plate
assembly (Figure 7, item 1):
•On both sides of conveyor, loosen fastening screws
(Figure 7, item 2).
•On both sides of conveyor, rotate cam tracking
assemblies (Figure 7, item 3) to move head plate
assembly inward.
Figure 7
Figure 7
c. On iDrive end of the conveyor, push in head plate
assembly (Figure 8, item 1):
•Remove middle screw (Figure 8, item 2) from
idrive head plate assembly (Figure 8, item 1) on
each side of conveyor.
Figure 8
Figure 8
•Loosen outer fastening screws (Figure 9, item 1)
from idrive head plate (Figure 9, item 2) (on each
side of conveyor) to allow head plate assembly to
slide in slots (Figure 9, item 3). Push head plate
inward toward conveyor.
Figure 9
Figure 9
3. Orient belt so splice outer fingers (Figure 10, item 1)
point in the direction of belt travel as identified by the
conveyor directional label (Figure 10, item 2).
Figure 10
Figure 10
3
2
1
1
2
1
1
2
3
3
1
2

851-978 Rev. A 11 Dorner Mfg. Corp.
2700 Series Conveyors
Installation
Figure 11
Figure 11
4. Roll out conveyor belt and place conveyor frame
sections (Figure 12, item 1) into belt loop.
Figure 12
Figure 12
5. Join conveyor sections and install frame connector
plates (Figure 13, item 1) or connector/mount brackets
(Figure 13, item 2) and screws (Figure 13, item 3) on
both sides as indicated. Tighten screws to 60 in-lb (7
Nm).
Figure 13
Figure 13
6. Tension conveyor belt. For proper tensioning, refer to
“Conveyor Belt Tensioning” on page 19”.
7. Install mounting brackets and return rollers. Refer to
“Mounting Brackets” on page 11 and “Return Rollers”
on page 12.
8. If equipped with cam tracking assemblies, reposition
and adjust belt tracking. Refer to “Conveyor Belt
Tracking” on page 20.
Mounting Brackets
1. Locate brackets. Exploded views shown in Figure 14.
Figure 14
Figure 14
2. Remove screws (Figure 14, item 1 & 2), washers
(Figure 14, item 3), nuts (Figure 14, item 4), and tee
bars (Figure 14, item 5) from brackets.
3. Insert tee bars (Figure 15, item 1) into conveyor side
slots (Figure 15, item 2).
Figure 15
Figure 15
NOTE
Verify V-Guide on belt (Figure 11, item 1), is
aligned with V-Guide in frame (Figure
11, item 2) and tails (Figure 11, item 3).
3
1
2
11
1
3
2
1
5
4
3
2
12

Dorner Mfg. Corp. 12 851-978 Rev. A
2700 Series Conveyors
Installation
4. Install mounting bracket (Figure 16, item 1) onto
conveyor frame, with frame plate (Figure 16, item 2)
resting on bottom of conveyor frame (Figure
16, item 3). Fasten brackets onto tee bars (Figure
16, item 4) in conveyor frame with mounting screws
(Figure 16, item 5).
Figure 16
Figure 16
5. Fasten brackets to support stand with mounting screws
(Figure 16, item 6), washers (Figure 14, item 3) and
nuts (Figure 14, item 4).
6. Tighten all screws to 60 in-lb (7 Nm).
Return Rollers
1. Locate return rollers. Exploded view shown in Figure
17.
Figure 17
Figure 17
2. Remove screws (Figure 17, item 1) and clips (Figure
17, item 2) from roller assembly.
3. Install roller assembly as shown (Figure 18, item 1).
Tighten screws (Figure 18, item 2) to 60 in-lb (7 Nm).
Figure 18
Figure 18
iDrive Wiring
1. No wiring is required. Attach end (Figure 19, item 1) of
motor wiring to threaded end (Figure 19, item 2) on
transformer unit.
Figure 19
Figure 19
5
2
4
3
6
1
1
2
2
1
A
WARNING
Motor may start immediately once power is
supplied. Exposed moving parts can cause
severe injury. LOCK OUT POWER before
wiring to avoid accidental startup.
1
2
2
1

851-978 Rev. A 13 Dorner Mfg. Corp.
2700 Series Conveyors
Installation
2. Install cover (Figure 20, item 1) with two screws
(Figure 20, item 2).
Figure 20
Figure 20
3. Attach quick disconnect end (Figure 20, item 3) of
power supply to power jack (Figure 20, item 4).
Guide Clips
1. Install guide clip assembly (Figure 21, item 1) into
conveyor t-slot (Figure 21, item 2) as shown.
Figure 21
Figure 21
2. Tighten screw (Figure 22, item 1) making sure t-nut
(Figure 22, item 2) rotates and engages inside of t-slot.
Figure 22
Figure 22
Adjustable Guides
1. Install guide bracket assembly (Figure 23, item 1) into
the conveyor t-slot (Figure 23, item 2).
Figure 23
Figure 23
2. Tighten screws (Figure 24, item 1) making sure t-nut
(Figure 24, item 2) rotates and engages inside of the t-
slot.
Figure 24
Figure 24
NOTE
1. Start Stop Application: Maximum start stop
cycles are 30 per minute.
2. Reversing Applications: Do not reverse the
motor direction when running. Make sure the
motor is stopped before reversing signal is
given.
1
3
4
2
1
2
1
2
1
2
1
2

Dorner Mfg. Corp. 14 851-978 Rev. A
2700 Series Conveyors
Installation
3. Loosen screw (Figure 25, item 1) on end of shaft
(Figure 25, item 2) to remove clip (Figure 26, item 1).
Figure 25
Figure 25
Figure 26
Figure 26
4. Snap clip (Figure 27, item 1) onto guide rail (Figure
27, item 2).
Figure 27
Figure 27
5. Reassemble clip (Figure 28, item 1) and attach to shaft
(Figure 28, item 2). Tighten screw (Figure 25, item 1)
on end of shaft.
Figure 28
Figure 28
6. Adjust rail width with top screw (Figure 29, item 1).
Figure 29
Figure 29
7. Adjust rail height with lower screw (Figure 30, item 1).
Figure 30
Figure 30
1
2
1
1
2
1
2
1
1

851-978 Rev. A 15 Dorner Mfg. Corp.
2700 Series Conveyors
Preventive Maintenance and Adjustment
Required Tools
Standard Tools
• Hex-key wrenches:
- 2.5 mm, 3mm, 4 mm, 5 mm
• Heavy-Duty Screwdriver
Checklist
• Keep service parts on hand (see “Service Parts” section for
recommendations)
• Keep supply of belt cleaner
• Clean entire conveyor and knurled pulley while disassem-
bled
• Replace worn or damaged parts
Lubrication
No lubrication is required. Replace bearings if worn.
Maintaining Conveyor Belt
Troubleshooting
Inspect conveyor belt for:
• Surface cuts or wear
• Stalling or slipping
• Damage to V-guide
Surface cuts and wear indicate:
• Sharp or heavy parts impacting belt
• Jammed parts
• Improperly installed bottom wipers (if installed)
• Accumulated dirt in wipers (if installed)
• Foreign material inside the conveyor
• Improperly positioned accessories
• Bolt-on guiding is pinching belt
Stalling or slipping indicates:
• Excessive load on belt
• Conveyor belt or drive timing belt are not properly ten-
sioned
• Worn knurl or impacted dirt on drive pulley
• Intermittent jamming or drive train problems
Damage to V-guide indicates:
• Twisted or damaged conveyor frame
• Dirt impacted on pulleys
• Excessive or improper side loading
Cleaning
Use mild soap and water. Do not soak the belt.
For /05 woven polyester and /06 black anti-static belts, use a
bristled brush to improve cleaning.
Conveyor Belt Replacement
Conveyor Belt Replacement Sequence
• Release tension
• Remove old conveyor belt:
- Conveyor without Stands or Gearmotor Mounting
Package
- Conveyor with Stands and Gearmotor Mounting
Package
• Install new conveyor belt
• Tension conveyor belt
A
WARNING
Exposed moving parts can cause severe
injury. LOCK OUT POWER before removing
guards or performing maintenance.

Dorner Mfg. Corp. 16 851-978 Rev. A
2700 Series Conveyors
Preventive Maintenance and Adjustment
Belt Removal for End Drive and iDrive
Conveyors
1. Place temporary support stands (Figure 31, item 1) at
both ends of the conveyor. Place an additional support
stand (Figure 31, item 2) under the drive motor, if
equipped. See WARNING.
Figure 31
Figure 31
2. If equipped, remove mounting brackets (Figure
31, item 3) from one side of conveyor. (Reverse steps 3
& 4 of “Mounting Brackets” section beginning on
page 11.) If equipped with heavy load drive package,
remove brackets from side opposite drive cover (Figure
32, item 1).
3. If equipped, remove return rollers and guiding and
accessories from side opposite drive cover (Figure
32, item 1).
Figure 32
Figure 32
4. If equipped with heavy load drive package, remove
bracket screws (Figure 32, item 2) and drive support
bracket (Figure 32, item 3).
5. Follow the corresponding instructions below:
a. Idler Tail
b. End Drive Tail
c. iDrive Tail
a. On idler end of conveyor, identified with a
label (Figure 33, item 1), push in head
plate assembly (Figure 33, item 2):
•On both sides of conveyor, loosen and move cam
tracking assemblies (Figure 33, item 3) (if
equipped) away from head plates.
• Loosen fastening screws (Figure 33, item 4) and push
head plate assembly inward.
Figure 33
Figure 33
b. On end drive of the conveyor, push in head plate
assembly (Figure 34, item 1):
•On both sides of conveyor, loosen fastening screws
(Figure 34, item 2).
•On both sides of conveyor, rotate cam tracking
assemblies (Figure 34, item 3) to move head plate
assembly inward.
Figure 34
Figure 34
A
WARNING
Removing mounting brackets without
support under gearmotor will cause
conveyor to tip, causing severe injury.
PROVIDE SUPPORT UNDERNEATH THE
GEARMOTOR WHEN CHANGING THE BELT.
11
2
3
3
1
3
2
2
3
1
4
2
3
2
1

851-978 Rev. A 17 Dorner Mfg. Corp.
2700 Series Conveyors
Preventive Maintenance and Adjustment
c. On iDrive end of the conveyor, push in head plate
assembly (Figure 35, item 1):
•Remove middle screw (Figure 35, item 2) from
idrive head plate (Figure 35, item 1) on each side
of conveyor.
Figure 35
Figure 35
•Loosen outer fastening screws (Figure 36, item 1)
from idrive head plate (Figure 36, item 2) (on each
side of conveyor) to allow head plate assembly to
slide in slots (Figure 36, item 3). Push head plate
inward toward conveyor.
Figure 36
Figure 36
6. Remove belt (Figure 37, item 1) from conveyor.
Figure 37
Figure 37
Belt Removal for Mid Drive Conveyors
1. Remove belt tension. See “Conveyor Belt Replacement”
on page 15 for releasing belt tension.
2. Remove two screws (Figure 38, item 1) from bottom of
mid drive assembly (Figure 38, item 2) on each side.
Figure 38
Figure 38
NOTE
To prevent damage to the head plates and
spindle, be sure to remove them slowly
because they are not attached to spindle.
1
2
1
1
2
3
3
A
WARNING
SEVERE HAZARD!
LOCK OUT POWER before removing guards
or performing maintenance. Exposed moving
parts can cause serious injury.
11
2
1

Dorner Mfg. Corp. 18 851-978 Rev. A
2700 Series Conveyors
Preventive Maintenance and Adjustment
3. Lower and remove mid drive module (Figure
39, item 1) from belt (Figure 39, item 2).
Figure 39
Figure 39
4. Remove belt (Figure 40, item 1) from conveyor frame.
Figure 40
Figure 40
5. Installation of new belt is the reverse order of removal.
Belt Installation for End Drive and iDrive
Conveyors
1. Ensure temporary support stands (Figure 41, item 1)
are placed at both ends of the conveyor. Place an
additional support stand under the drive motor (Figure
41, item 2), if equipped. See WARNING.
Figure 41
Figure 41
2. Orient belt so splice outer fingers (Figure 42, item 1)
point in the direction of belt travel as identified by the
conveyor directional label (Figure 42, item 2).
Figure 42
Figure 42
Figure 43
Figure 43
A
WARNING
Removing mounting brackets without
support under gearmotor will cause
conveyor to tip, causing severe injury.
PROVIDE SUPPORT UNDERNEATH THE
GEARMOTOR WHEN CHANGING THE BELT.
1
2
1
NOTE
Verify V-Guide on belt (Figure 43, item 1), is
aligned with V-Guide in frame (Figure
43, item 2) and tails (Figure 43, item 3).
11
2
1
2
3
1
2

851-978 Rev. A 19 Dorner Mfg. Corp.
2700 Series Conveyors
Preventive Maintenance and Adjustment
3. Install belt (Figure 44, item 1) on conveyor. Lift
conveyor slightly to avoid pinching belt on temporary
support stands.
Figure 44
Figure 44
4. Re-install conveyor mounting brackets. Refer to
“Mounting Brackets” beginning on page 11, steps 3
through 5.
5. If equipped with a heavy load drive package, install
drive support bracket (Figure 45, item 1).
Figure 45
Figure 45
6. Tension belt. Refer to “Conveyor Belt Tensioning” on
page 19.
7. If equipped, install return rollers and guiding.
Conveyor Belt Tensioning
1. For standard end drive conveyors, on fixed end of the
conveyor, identified with a label (Figure
46, item 1), adjust head plate assembly (Figure
46, item 2):
a. On both sides of conveyor, loosen fastening screws
(Figure 46, item 3).
b. On both sides of conveyor, rotate cam tracking
assemblies (Figure 46, item 4) all the way to move
head plates out.
Figure 46
Figure 46
2. For standard end drive conveyors, on tension end of the
conveyor, identified with a label (Figure
47, item 1), adjust head plate assembly (Figure
47, item 2):
a. On both sides of conveyor, loosen fastening screws
(Figure 47, item 3).
b. On both sides of conveyor, adjust cam tracking
assemblies (Figure 47, item 4) (if equipped) to
adjust head plate assembly.
Figure 47
Figure 47
A
WARNING
Exposed moving parts can cause severe
injury. LOCK OUT POWER before removing
guards or performing maintenance.
11
1
4
12
3
4
1
3
2

Dorner Mfg. Corp. 20 851-978 Rev. A
2700 Series Conveyors
Preventive Maintenance and Adjustment
3. Adjust head plate assembly so end of conveyor frame
aligns with or between the head plate tensioning marks
(Figure 48, item 1 & 2). Replace belt if proper
tensioning can not be obtained while aligning the end of
the conveyor frame with or between the tensioning
marks.
Figure 48
Figure 48
4. After adjusting proper tensioning, tighten fastening
screws (Figure 46, item 3) or (Figure 47, item 3) on
both sides of conveyor to 60 in-lb (7 Nm).
Conveyor Belt Tracking
V-Guided Belts
V-guided belts do not require tracking adjustment.
Non V-Guided Belts
Non V-guided belt conveyors are equipped with belt tracking
cam assemblies (Figure 49, item 1) for belt tracking
adjustment.
Figure 49
Figure 49
When adjusting belt tracking, always adjust the discharge
end of the conveyor first. To adjust belt tracking:
1. Ensure head plate fastening screws (Figure 49, item 2)
on both sides of conveyor are tightened.
2. On both sides of conveyor, loosen cam fastening screw
(Figure 49, item 3). Adjust cams (Figure 49, item 4)
until indicator slots (Figure 49, item 5) are horizontal
and facing end of conveyor. Then slide cam assemblies
against head plates (Figure 49, item 6) and re-tighten
cam fastening screws (Figure 49, item 3) to 60 in-lb (7
Nm).
3. On the side toward which the belt is tracking, loosen
head plate fastening screws (Figure 49, item 2).
4. With the conveyor running, use a 5 mm hex-key wrench
to rotate the tracking cam (Figure 49, item 4) in small
increments until the belt tracks in the center of the
conveyor. Then while holding the cam in position, re-
tighten the head plate fastening screws (Figure
49, item 2) with a 4 mm hex-key wrench to 60 in-lb (7
Nm).
End Drive Conveyor Belts
End drive conveyors are equipped with internal belt cam
assemblies for belt tracking adjustment on motor end.
When adjusting belt tracking, always adjust the discharge
end of the conveyor first. To adjust belt tracking:
1. On the side opposite which the belt is tracking, loosen
head plate fastening screws (Figure 50, item 1).
Figure 50
Figure 50
2. With the conveyor running, use a hex-key wrench to
rotate the tracking cam (Figure 50, item 2) to retract tail
in small increments until the belt tracks in the center of
the conveyor. Then while holding the cam in position,
re-tighten the head plate fastening screws (Figure
50, item 1) to 60 in-lb (7 Nm).
NOTE
On pinion gear, do not exceed a torque of 25
in-lb (2.8 Nm) for 8 – 12" (203 – 305 mm)
wide conveyors and 50 in-lb (4.5 Nm) for a
14 – 36" (356 – 914 mm) wide conveyor. Over
tensioning the conveyor belt could cause
excessive pulley bearing load and early
failure.
1
2
2
3
5
BELT TRAVEL
1
4
6
2
1