Dorner AquaGard 7300 Series User manual

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DORNER MFG. CORP. INSIDE THE USA OUTSIDE THE USA
P.O. Box 20 • 975 Cottonwood Ave. TEL: [phone] TEL: [phone]
Hartland, WI 53029-0020 USA FAX: [phone] FAX: [phone]
851-568 Rev. E
7300 Series Sanitary End
Drive Conveyors
Installation, Maintenance & Parts Manual
Featuring: Technology

Dorner Mfg. Corp. 2 851-568 Rev. E
7300 Series Sanitary End Drive Conveyors
Table of Contents
Introduction ......................................................................... 2
Warnings - General Safety .................................................. 3
Product Description ............................................................. 4
Specifications ...................................................................... 4
Flat Belt 7300 Series Sanitary Conveyor......................... 4
Cleated Belt 7300 Series Sanitary Conveyor................... 4
Conveyor Supports: ......................................................... 4
Specifications:.................................................................. 5
Installation ........................................................................... 6
Required Tools................................................................. 6
Recommended Installation Sequence .............................. 6
Conveyors Up to 12 ft (3658 mm)................................... 6
Conveyors Longer Than 12 ft (3658 mm) ....................... 6
Attaching Conveyor to Stands or Mounting Brackets ..... 7
Return Rollers .................................................................. 8
2" (51 mm) Through 6" (152 mm)
Wide Flat Belt and All Cleated Belt Conveyors .......... 8
8" (203 mm) Through 18" (457 mm)
Wide Flat Belt Conveyors ............................................ 9
Preventive Maintenance and Adjustment.......................... 10
Required Tools............................................................... 10
Checklist ........................................................................ 10
Lubrication..................................................................... 10
Conveyor Bearings..................................................... 10
Return Rollers ............................................................ 10
Maintaining Conveyor Belt ........................................... 10
Troubleshooting ......................................................... 10
Cleaning ..................................................................... 10
Conveyor Belt Replacement .......................................... 10
Conveyor Belt Replacement Sequence
(see Table of Contents for page number)................... 10
A – Belt Removal for Conveyor Without
Gearmotor Mounting Package or Stands ................... 11
B – Belt Removal for Conveyor With
Stands and/or Gearmotor Mounting Package ............. 12
A – Belt Installation for Conveyor without
Gearmotor Mounting Package or Stands .................... 13
B – Belt Installation for Conveyor with Gearmotor
Mounting Package and/or Stands ............................... 14
Conveyor Belt Tensioning.............................................. 14
Pulley Removal .............................................................. 15
A −Drive Pulley Removal.......................................... 15
B −Idler Pulley Removal ........................................... 16
Bearing Replacement for Drive or Idler Pulley.............. 17
Bearing Removal ........................................................ 17
Bearing Installation..................................................... 17
Pulley Installation........................................................... 17
A −Drive Pulley Installation ...................................... 17
B – Idler Pulley Installation........................................ 18
NOTES............................................................................... 19
Service Parts....................................................................... 20
Drive End Components .................................................. 20
Tension End Components .............................................. 21
Conveyor Frame and Extension ..................................... 22
–21 1” (25mm) Sanitary Bolt–On High Sides................ 23
–22 2” (51mm) Sanitary Bolt – On High Sides.............. 24
–23 Sanitary Fully Adjustable UHMW Guide ............... 25
–24 Sanitary Adjustable Width UHMW Guides ............ 26
Sanitary 2” (51mm) Through 6” (152mm)
Wide Flat and Cleated Belt Return Roller...................... 27
Sanitary 8” (203mm) Through 18” (457mm)
Wide Flat Belt Return Roller.......................................... 27
Conveyor Mounting Brackets ........................................ 28
Configuring Conveyor Belt Part Number ...................... 29
Flat Belt Conveyor...................................................... 29
Cleated Belt Conveyor................................................ 29
Return Policy...................................................................... 30
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 7300 Series conveyors are covered by Patent Nos.
5174435, 6109427, 6685009 and corresponding patents and
patent applications in other countries.
Dorner reserves the right to make changes at any time
without notice or obligation.
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 .
IMPORTANT
Some illustrations may show guards
removed. DO NOT operate equipment
without guards.

851-568 Rev. E 3 Dorner Mfg. Corp.
7300 Series Sanitary End Drive 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
Climbing, sitting, walking or riding on
conveyor will cause severe injury.
KEEP OFF CONVEYORS.
A
DANGER
DO NOT OPERATE CONVEYORS IN AN
EXPLOSIVE ENVIRONMENT.
A
WARNING
Exposed moving parts can cause severe
injury.
LOCK OUT POWER before removing guards
or performing maintenance.
A
WARNING
Gearmotors may be HOT.
DO NOT TOUCH Gearmotors.
A
WARNING
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.
A
WARNING
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.

Dorner Mfg. Corp. 4 851-568 Rev. E
7300 Series Sanitary End Drive Conveyors
Product Description
Refer to Figure 1 for typical conveyor components. Figure 1
Figure 1
Specifications
Flat Belt 7300 Series Sanitary
Conveyor Cleated Belt 7300 Series Sanitary
Conveyor
* See “Ordering and Specifications” Catalog for details.
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 gearmotor.
*** For conveyors longer than 12 ft (3658 mm), install
support at frame joint.
Figure 2
Figure 2
A Conveyor
B Gearmotor
C Belt (Flat Belt Shown)
D Mounting Plates
E Return Roller
F Support Stands
G Motor Controller
H Drive End
I Tensioning End
A
B
C
G
HI
FE
D
Conveyor Width Reference
Conveyor Length Reference
Belt Type*
Output Shaft Position*
Conveyor Profile*
3 = End Drive Conveyor
Document Language, M = USA English
7 D B M WW LLLL P GG BB
1= No Wiper – with Mounting Brackets
2 = No Wiper – without Mounting Brackets
3 = End Wiper – with Mounting Brackets
4 = End Wiper – without Mounting Brackets
5 = Dual Wiper – with Mounting Brackets
6 = Dual Wiper – without Mounting Brackets
Conveyor Width Reference
Conveyor Length Reference
Output Shaft Position*
Cleat Spacing*
6 = Cleated Belt with Mounting Brackets
7 = Cleated Belt without Mounting Brackets
0 = Low Friction Cleated Belt with Mounting Brackets
1 = Low Friction Cleated Belt without Mounting
Brackets
Document Language, M = USA English
7 D B M WW LLLL P SSSS
Cleat Type (A–J)*
KJ L

851-568 Rev. E 5 Dorner Mfg. Corp.
7300 Series Sanitary End Drive Conveyors
Specifications
Specifications:
* See “Ordering and Specifications” Catalog for details. **
Lengths available only in 6" (152 mm) & wider conveyors.
Conveyor Width
Reference (WW) 02 03 04 05 06 08 10 12 18
Conveyor Belt Width 1.75"
(44 mm) 2.75" (70 mm) 3.75" (95mm)
5"
(127 mm) 6" (152mm) 8" (203mm) 10" (254mm) 12" (305mm) 18" (457mm)
MaximumConveyorLoad*
(See NOTE Below) 30 lb (14 kg) 35 lb (16 kg) 42 lb (19 kg) 50 lb (23 kg) 60 lb (27 kg) 70 lb (32 kg) 80 lb (36 kg) 80 lb (36 kg) 80 lb (36 kg)
Conveyor Start-up
Torque* 4 in-lb (0.5 Nm) 5 in-lb (0.6 Nm) 6 in-lb (0.7 Nm) 7 in-lb (0.8 Nm) 8 in-lb (0.9 Nm) 10 in-lb (1.1 Nm) 12 in-lb (1.4 Nm) 14 in-lb (1.5 Nm) 15 in-lb (1.7 Nm)
Belt Travel 4.3" (109 mm) per revolution of pulley
Maximum Belt Speed* 235 feet/minute (72 meters/minute)
Belt Take-up 0.38" (10 mm) of stroke = 0.75" (19 mm) of belt take-up
Conveyor Length
Reference (LL) 02 03 04 05 06 07 08 09 10 11 12 13** 14** 15** 16** 17** 18**
Conveyor Length
2-ft (610 mm) 3-ft (914 mm)
4-ft (1219 mm) 5-ft (1524 mm) 6-ft (1829 mm) 7-ft (2134 mm) 8-ft (2438 mm) 9-ft (2743 mm)
10-ft (3048 mm) 11-ft (3353 mm) 12-ft (3658 mm)
13-ft (3962 mm)** 14-ft (4267 mm)** 15-ft (4572 mm)** 16-ft (4877 mm)** 17-ft (5182 mm)** 18-ft (5486 mm)**
NOTE
Maximum conveyor loads are based on:
• Non-accumulating product
• Product moving towards gearmotor
• Conveyor being mounted horizontal
• Conveyor being located in a dry environment
• Conveyor with standard belt only

Dorner Mfg. Corp. 6 851-568 Rev. E
7300 Series Sanitary End Drive Conveyors
Installation
Figure 3
Figure 3
Figure 4
Figure 4
Required Tools
• 10 mm wrench (for hexagon head fasteners)
• Level
• Torque wrench
Recommended Installation
Sequence
• Assemble conveyor (if required)
• Install stands (see accessory instructions)
• Attach stands/mounting brackets to conveyor (see page 7)
• Mount gearmotor mounting package (see accessory
instructions)
• Attach return rollers (see page 8)
• Attach guides/accessories (see “Service Parts” section
starting on page 20)
Conveyors Up to 12 ft (3658 mm)
No assembly is required. Install stands/mounting brackets
and return rollers. Refer to “Attaching Conveyor to Stands or
Mounting Brackets” on page 7 and “Return Rollers” on
page 8.
Conveyors Longer Than 12 ft (3658
mm)
1. Typical components (Figure 5).
Figure 5
Figure 5
NOTE
7300 Series sanitary conveyors are shipped
with a “belt travel direction” sticker (Figure
3, item M) installed. After drive is installed
and tested, remove sticker.
NOTE
Dorner recommends cleaning all the “food
zones” prior to placing conveyor into service.
Insure adequate access is provided for
cleaning and servicing equipment so that the
required level of hygiene can be maintained.
NOTE
Conveyor MUST be mounted straight, flat,
and level within confines of conveyor. Use a
level (Figure 4, item N) during setup.
M
N
O Conveyor frame extension
P M6 x 10 mm Hex Head Cap Screws (12x)
Q Connector Strips (2x)
R Conveyor frame
R
O
Q
P

851-568 Rev. E 7 Dorner Mfg. Corp.
7300 Series Sanitary End Drive Conveyors
Installation
2. Compress tension end (Figure 6). Refer to steps 4 and 5
under the “Belt Removal for Conveyor Without
Gearmotor Mounting Package or Stands” on page 11.
Figure 6
Figure 6
3. Install frame connecting bar (Figure 7, item Q) on
conveyor frame (R) with three screws (P). Do not
tighten screws.
Figure 7
Figure 7
4. Repeat step 3 for other side of conveyor frame.
5. Install conveyor frame extension (Figure 8, item O) on
frame connecting bar (Q) with three screws (P). Install
three screws (P) on opposite side. Tighten all screws to
92 in-lb (10.4 Nm).
Figure 8
Figure 8
6. Install conveyor belt. Refer to steps 1 through 3 under
“Belt Installation for Conveyor without Gearmotor
Mounting Package or Stands” on page 13.
7. Tension conveyor belt. Refer to “Conveyor Belt
Tensioning” on page 14.
Attaching Conveyor to Stands or
Mounting Brackets
1. Typical mounting bracket components (Figure 9).
Figure 9
Figure 9
2. Attach clamp plate (Figure 9, item V or W) to stand/
conveyor ear mount bracket (U) with two screws (S).
Do not tighten screws.
P
QR
P
O
Q
NOTE
Conveyor may be mounted using mounting
brackets as shown in Figure 9 and Figure 10
or directly to support stands. For direct
support stand mounting, see stand manual.
S M6 x 10 mm Hex Head Cap Screw (4x)
T M6 x 12 mm Hex Head Cap Screw (4x)
U Stand/Conveyor Ear Mount Bracket (2x)
V Clamp Plate, Flat Belt (2x)
or
W Clamp Plate, Cleated Belt (2x)

Dorner Mfg. Corp. 8 851-568 Rev. E
7300 Series Sanitary End Drive Conveyors
Installation
3. Attach stand/conveyor ear mount bracket (Figure
10, item U) to bottom of conveyor (Z). Make sure notch
(AA) on bracket straddles conveyor edge as shown.
Snug–up two screws (S).
Figure 10
Figure 10
4. Repeat steps 2 and 3 for other mounting bracket(s).
Tighten all screws (S) to 80 in-lb (9 Nm).
Return Rollers
2" (51 mm) Through 6" (152 mm) Wide Flat
Belt and All Cleated Belt Conveyors
1. Return roller components (Figure 11).
Figure 11
Figure 11
2. Loosely attach clamp plate (Figure 12, item AC) on
mounting block (AB) with two screws (AD). Do not
tighten screws.
Figure 12
Figure 12
3. Attach return roller assembly (Figure 13, item AE) on
each side of conveyor (Z). Tighten screws (AD) to 80
in-lb (9 Nm).
Figure 13
Figure 13
4. On 8–18 ft (2338–5486 mm) conveyor, repeat step 3 as
necessary for other return rollers.
NOTE
No return rollers are required on conveyor
lengths up to 7 ft (2134 mm). Use one pair of
rollers centered between the tensioning and
drive spindles on 8–15 ft (2438–4572 mm)
conveyors. Use two pairs of rollers at one
third distances between the tensioning and
drive spindles on 16–18 ft (4877–5486 mm)
conveyors.
S
Z
AA
U
AB Mounting Block
AC Clamp Plate
AD Hex Head Cap Screw M6−1.0 x 12mm (2x)
AD
AB
AC
AD
AB
AC
AD
AE
Z

851-568 Rev. E 9 Dorner Mfg. Corp.
7300 Series Sanitary End Drive Conveyors
Installation
8" (203 mm) Through 18" (457 mm) Wide
Flat Belt Conveyors
1. Typical return roller components (Figure 14)
Figure 14
Figure 14
2. Loosely attach two clamp plates (Figure 15, item AG)
on roller and guard assembly (AF) with four screws
(AH). Do not tighten screws.
Figure 15
Figure 15
3. Attach return roller assembly (Figure 16, item AI) on
conveyor (Z). Make sure return roller assembly is
perpendicular with conveyor frame as shown. Tighten
screws (Figure 15, item AH) to 80 in-lb (9 Nm).
Figure 16
Figure 16
4. On 16–18 ft (4877–5486 mm) conveyor, repeat steps 2
and 3 for other return roller.
NOTE
No return rollers are required on conveyor
lengths up to 7 ft (2134 mm). Use one roller
centered between the idler and drive spindles
on 8–15 ft (2438–4572 mm) conveyors. Use
two rollers at one third distances between the
idler and drive spindles on 16–18 ft (4877–
5486 mm) conveyors.
AF Return Roller and Guard Assembly
AG Return Roller Clamp Plate (2x)
AH Hex Head Cap Screw M6−1.0 x 12mm (4x)
AH
AF
AG
AF
AH
AG
AH
AI
Z
90

Dorner Mfg. Corp. 10 851-568 Rev. E
7300 Series Sanitary End Drive Conveyors
Preventive Maintenance and Adjustment
Required Tools
• Wrenches: 8 mm, 10 mm, 17 mm, 3/8” (or an adjustable
wrench)
• Hex key wrench: 3 mm
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
Conveyor Bearings
Conveyor bearing lubrication is required. Dorner
recommends using an H-1 food grade grease.
Return Rollers
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 wiper(s)
• Accumulated dirt in wiper(s)
• 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 Dorner Belt Cleaner. Mild soap and water may also be
used. 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
(see Table of Contents for page number)
• Remove old conveyor belt
A - Conveyor without Gearmotor Mounting Package or
Stands
B - Conveyor with Stands and/or Gearmotor Mounting
Package
• Install new conveyor belt
A - Conveyor without Gearmotor Mounting Package or
Stands
B - Conveyor with Stands and/or Gearmotor Mounting
Package
• Tension conveyor belt
NOTE
Dorner recommends cleaning all the “food
zones” prior to placing conveyor into service.
Insure adequate access is provided for
cleaning and servicing equipment so that the
required level of hygiene can be maintained.
A
WARNING
Exposed moving parts can cause severe
injury.
LOCK OUT POWER before removing guards
or performing maintenance.

851-568 Rev. E 11 Dorner Mfg. Corp.
7300 Series Sanitary End Drive Conveyors
Preventive Maintenance and Adjustment
A – Belt Removal for Conveyor Without
Gearmotor Mounting Package or Stands
1. If installed, remove and retain two M5 hex head screws
(Figure 17, item AJ), bottom wiper (AK) and two
sleeves (AL).
Figure 17
Figure 17
2. If installed, repeat step 1 for other wiper.
3. If conveyor is equipped with guiding and accessories or
return rollers, remove and retain them as necessary.
4. Loosen four M6 hex head cap screws (Figure
18, item AM) and (Figure 19, item AM).
Figure 18
Figure 18
5. Retract idler spindle assembly (Figure 19, item AN) by
pushing in on it or by turning M6 hex head pinion screw
(AO) clockwise.
Figure 19
Figure 19
6. Remove bearing cover (Figure 20, item AP) from drive
end of conveyor.
Figure 20
Figure 20
7. Using a 3mm hex key wrench (Figure 21, item AQ),
loosen two set screws (AR) on bearing and head plate
assembly (AS).
Figure 21
Figure 21
AK
AJ
AL
AM
AO
AN
AM
AP
APAR
AR
AS
AQ

Dorner Mfg. Corp. 12 851-568 Rev. E
7300 Series Sanitary End Drive Conveyors
Preventive Maintenance and Adjustment
8. Remove three hex head screws (Figure 22, item AT and
AU) from bearing and head plate assembly (AS), cross
support post (Figure 23, item AV) and conveyor (Z).
Figure 22
Figure 22
9. Rotate bearing and head plate assembly (Figure
23, item AS) down and then off of cross support post
(AV) and drive spindle (AW).
Figure 23
Figure 23
10. Remove conveyor belt (Figure 24, item AX).
Figure 24
Figure 24
B – Belt Removal for Conveyor With
Stands and/or Gearmotor Mounting
Package
Figure 25
Figure 25
1. Perform steps 1 through 9 under “Belt Removal for
Conveyor Without Gearmotor Mounting Package or
Stands”.
2. Place a temporary support (Figure 25, item BB) and
(Figure 26, item BB) under gearmotor mounting
package.
AS
AT
Z
AU
AS
AW
AV
AX
NOTE
For conveyor with a Heavy Load Bottom or
Top Gearmotor Mounting Package, bracket
(Figure 25, item AY) must be removed.
• Remove two M6x30 mm hex head cap screws
and spacers (AZ).
• Remove two M6x16 mm hex head cap screws
(BA).
• Remove bracket (AY).
A
WARNING
The weight of the gearmotor is all on one end
of the conveyor which could cause it to tip off
the stands when the mounting clamp plates
are loosened. Be sure to provide support
(Figure 25, item BB) and (Figure 26, item BB)
underneath the gearmotor while changing
the be
AZ
AY
BA
BB

851-568 Rev. E 13 Dorner Mfg. Corp.
7300 Series Sanitary End Drive Conveyors
Preventive Maintenance and Adjustment
Figure 26
Figure 26
3. Loosen two clamp plate screws (Figure 27, item S) on
side of conveyor opposite drive motor.
Figure 27
Figure 27
4. Repeat step 3 for remaining stand/conveyor ear mount
brackets or stand assemblies on same side of conveyor.
5. Raise conveyor and remove conveyor belt (Figure
28, item AX).
Figure 28
Figure 28
6. If a new belt will not be installed immediately, secure
conveyor with stand/conveyor ear mount brackets or
stand assemblies.
A – Belt Installation for Conveyor without
Gearmotor Mounting Package or Stands
1. Orient conveyor belt so the splice leading fingers
(Figure 29, item BD) point in the direction of belt travel
(BE).
Figure 29
Figure 29
2. Slide belt (Figure 24, item AX) onto the conveyor frame
assembly.
3. Install bearing and head plate assembly (Figure
30, item AS) onto drive spindle (AW). Tighten two set
screws to 34 in-lb (3.8 Nm). Check after 24 hrs. of
conveyor usage.
Figure 30
Figure 30
4. Rotate bearing and head plate assembly (Figure
31, item AS) up between inside of conveyor (Z) and
cross support post (AV). Make sure cross support post
engages slot (BF) in head plate.
Figure 31
Figure 31
BB
S
AX
BD
BE
AS
AW
AV
AS
BF
AV
Z

Dorner Mfg. Corp. 14 851-568 Rev. E
7300 Series Sanitary End Drive Conveyors
Preventive Maintenance and Adjustment
5. Install three hex head screws (Figure 22, item AT and
AU) to secure bearing and head plate assembly (Figure
31, item AS) to cross support post (AV) and conveyor
(Z).
6. Using a 3mm hex key wrench (Figure 21, item AQ),
tighten two set screws (AR) on bearing (AS).
7. Install bearing cover (Figure 20, item AP) on drive end
of conveyor.
8. If removed, install sleeves (Figure 17, item AL), bottom
wiper(s) (AK) and M5 hex head screws (AJ). Tighten
screws to 33 in-lb (3.7 Nm).
9. Tension belt. Refer to “Conveyor Belt Tensioning” on
page 14.
10. If removed, install return rollers, guiding and
accessories.
B – Belt Installation for Conveyor with
Gearmotor Mounting Package and/or
Stands
Figure 32
Figure 32
1. Orient conveyor belt so that the splice leading fingers
(Figure 29, item BD) point in the direction of belt travel
(BE) as identified by the label (Figure 32, item BC).
2. Slide belt (Figure 28, item AX) onto conveyor frame
assembly.
3. Tighten two clamp plate screws (Figure 27, item S)
4. Repeat step 3 for remaining stand/conveyor ear mount
brackets or stand assemblies.
5. Install bearing and head plate assembly following steps
steps 3 through 7 under “Belt Installation for Conveyor
Without Gearmotor Mounting Package or Stands” on
page 13.
6. If removed, install sleeves (Figure 17, item AL), bottom
wiper(s) (AK) and M5 hex head screws (AJ). Tighten
screws to 33 in-lb (3.7 Nm).
7. For a conveyor with a Heavy Load Bottom or Top
Mounting package, install bracket (Figure 25, item AZ).
8. Tension belt. Refer to “Conveyor Belt Tensioning” on
page 14.
9. If removed, install return rollers, guiding and
accessories.
Conveyor Belt Tensioning
1. On tension end of the conveyor, loosen two M6 hex
head cap screws (Figure 33, item AM) on each side of
conveyor.
Figure 33
Figure 33
2. Extend idler spindle assembly (AN) by turning M6 hex
head screw (BH) clockwise to sufficiently tension belt
to handle conveyor load.
3. Tighten four M6 hex head screws (AM) to 40 in-lb (4.5
Nm) to secure idler spindle assembly (AN).
IMPORTANT
On a flat belt conveyor, the wiper is installed
on discharge end. Belt travel direction is
identified by an arrow decal on the drive cover
(Figure 32, item BC).
BC
A
WARNING
Exposed moving parts can cause severe
injury.
LOCK OUT POWER before removing guards
or performing maintenance.
NOTE
Do not exceed a torque of 25 in-lb (2.8 Nm)
for 2" to 12" (44 mm to 305 mm) wide
conveyors or 40 in-lb (4.5 Nm) for an 18" (457
mm) wide conveyor on tensioning screw (BH).
Over-tensioning the conveyor belt could
cause excessive pulley bearing load and
early failure.
NOTE
If the maximum take-up stroke is achieved,
replace the conveyor belt.
AN
BH
AM

851-568 Rev. E 15 Dorner Mfg. Corp.
7300 Series Sanitary End Drive Conveyors
Preventive Maintenance and Adjustment
Pulley Removal
Remove conveyor belt to access pulley(s). See “Conveyor
Belt Replacement” on page 10. Remove the desired pulley
following instructions:
•A−Drive Pulley Removal
•B−Idler Pulley Removal
A −Drive Pulley Removal
1. Remove the gearmotor mounting package. See
accessory instructions.
2. Remove screw (BJ) from conveyor (Z) and cross
support post (AV).
Figure 34
Figure 34
3. Remove screw (Figure 35, item AU) and cross support
post (AV) from conveyor (Z) and drive spindle assembly
(BL).
4. Remove two screws (Figure 35, item BK) and drive
spindle assembly (BL) from conveyor (Z).
Figure 35
Figure 35
5. On closed end of drive spindle assembly (Figure
36, item BL), use a screwdriver to pry off bearing cover
(AP).
Figure 36
Figure 36
A
WARNING
Exposed moving parts can cause severe
injury.
LOCK OUT POWER before removing guards
or performing maintenance.
A
WARNING
Drive shaft keyway may be sharp.
HANDLE WITH CARE.
NOTE
Two screws (Figure 34, item BI ) were
removed in step 1.
If conveyor is in the upright position, cross
support post (AV) will not be secure and may
drop when screws (Figure 34, item BJ) and
(Figure 35, item AU) are removed.
BI BJ
AV
Z
BL
NOTE
For a conveyor with a Heavy Load Bottom or
Top Gearmotor Mounting Package, the two
screws (Figure 35, item BK) were removed in
step 1.
If conveyor is in the upright position, drive
spindle assembly (Figure 35, item BL) will not
be secure and may drop when screws (Figure
34, item AU, BJ and BK) and (Figure
35, item AU, BJ and BK) are removed.
BK
BL
AU
AV
BL
AP

Dorner Mfg. Corp. 16 851-568 Rev. E
7300 Series Sanitary End Drive Conveyors
Preventive Maintenance and Adjustment
6. Using a 3mm hex key wrench (Figure 37, item AQ),
loosen two set screws (AR) on bearing and head plate
assembly (AS).
Figure 37
Figure 37
7. Remove bearing and head plate assembly (AS of Figure
38) from drive spindle (AW).
Figure 38
Figure 38
8. Repeat steps 6 and 7 for opposite side of drive spindle.
B −Idler Pulley Removal
1. While holding hex pinion (Figure 39, item BO) with a 3/
8” open–end wrench, loosen M6 hex head cap screw
(AO).
Figure 39
Figure 39
2. Remove M6 hex head cap screw (Figure 40, item AO)
and sleeve (BP) from conveyor (Z) and hex pinion
(BO).
Figure 40
Figure 40
3. Repeat steps 1 and 2 for screw (Figure 41, item BH) on
opposite side of conveyor.
4. Remove two M6 hex head cap screws (AM) from each
side of conveyor.
5. Remove two pinion ends (BQ), Wedge-Lok® clamp
blocks (BR), hex pinion (BO), two spacers (BS) and tail
assembly (AN) from conveyor (Z).
Figure 41
Figure 41
NOTE
If bearings (Figure 37, item BM) require
removal from head plates (BN), see “Bearing
Removal” on page 17.
AR AR
AQ
BN
BM
AS
AW
AS
AO
BO
AO BP Z
BO
AM
BO
BS
Z
AN
BR
BQ
BS
BH
AM
AM
AO BP
BQ
BP

851-568 Rev. E 17 Dorner Mfg. Corp.
7300 Series Sanitary End Drive Conveyors
Preventive Maintenance and Adjustment
6. Use a screwdriver to remove bearing cover (Figure
42, item BT) from tail assembly (AN).
Figure 42
Figure 42
7. Using a 3mm hex key wrench (Figure 43, item AQ),
loosen two set screws (BU) on bearing and head plate
aseembly (BV) .
Figure 43
Figure 43
8. Remove bearing and head plate assembly (Figure
44, item BV) from idler spindle (BW).
Figure 44
Figure 44
9. Repeat steps 6, 7 and 8 for opposite side of idler spindle.
Bearing Replacement for Drive or
Idler Pulley
Bearing Removal
1. Using a 17 mm wrench, remove two hex head screws
(Figure 45, item BX) from bearing (BY) and head plate
(BZ).
Figure 45
Figure 45
Bearing Installation
1. Install bearing (Figure 45, item BY) on head plate (BZ)
with two hex head screws (BX). Tighten screws to 36
ft–lb (49 Nm). Check after 24 hrs. of conveyor usage.
Pulley Installation
A −Drive Pulley Installation
1. Make sure bearing surfaces on drive spindle are free of
nicks and burrs. Slide bearing and head plate assembly
(Figure 38, item AS) on drive spindle (AW).
2. Repeat step 1 for opposite side of drive spindle.
3. Position drive spindle assembly (Figure 35, item BL) on
conveyor (Z) and loosely secure with two screws (BK).
4. Install cross support post (Figure 35, item AV) and
secure with two screws (Figure 34, item BJ) and (Figure
35, item AU). Tighten screws to 33 in–lb (3.7 Nm).
BT
AN
AQ
BU
BV
BV
BW
BX
BY
BZ

Dorner Mfg. Corp. 18 851-568 Rev. E
7300 Series Sanitary End Drive Conveyors
Preventive Maintenance and Adjustment
Figure 46
Figure 46
5. Make sure center of groove (Figure 46, item CA) on
spindle (AW) is aligned with center of groove (CB) on
conveyor (Z).
6. Using a 3mm hex key wrench (Figure 37, item AQ),
tighten two set screws (AR) on each bearing and head
plate assembly (AS).
7. On closed end of drive spindle assembly (Figure
36, item BL), install bearing cover (AP).
8. Install gearmotor mounting package. See accessory
instructions.
B – Idler Pulley Installation
1. Make sure bearing surfaces on idler spindle are free of
nicks and burrs. Slide bearing and head plate assembly
(Figure 44, item BV) on idler spindle (BW).
2. Repeat step 1 for opposite side of idler spindle.
Figure 47
Figure 47
3. Position tail assembly (AN) and two spacers (BS) on
conveyor (Z).
Figure 48
Figure 48
4. Loosely install two pinion ends (Figure 41, item BQ)
and (Figure 48, item BQ), hex pinion (BO) and clamp
blocks (BR) on tail assembly (AN) and conveyor (Z)
with four M6x20mm hex head cap screws (Figure
40, item AM), two sleeves (BP) and two M6x25mm hex
head cap screws (AO).
5. While holding hex pinion (Figure 39, item BO) with a 3/
8” open–end wrench, tighten two screws (Figure
39, item AO) and (Figure 41, item BH) to 33 in–lb (3.7
Nm).
6. Tighten four screws (Figure 40, item AM) to 33 in–lb
(3.7 Nm).
7. Make sure center of groove (Figure 48, item CC) on
spindle (BW) is aligned with center of groove (CD) on
conveyor (Z).
8. Using a 3mm hex key wrench (Figure 43, item AQ),
tighten two set screws (BU) on each bearing and head
plate assembly (BV).
9. Install two bearing covers (Figure 42, item BT) on tail
assembly (AN).
10. Install gearmotor mounting package. See accessory
instructions.
IMPORTANT
Before tightening set screws on bearing and
head plate assemblies, make sure that center
of groove (Figure 46, item CA) on spindle
(AW) is in line with center of groove (CB) on
conveyor (Z).
IMPORTANT
Loosely install a spacer (Figure 41, item BS)
and (Figure 47, item BS) on each side of tail
assembly (AN) prior to installing tail assembly
on conveyor.
CA
CB
AW
Z
BS
AN
IMPORTANT
During idler pulley installation, orient both
pinion ends (Figure 48, item BQ ) so they
engage the same tooth positions on their
respective racks.
IMPORTANT
Before tightening set screws on bearing and
head plate assemblies, make sure that center
of groove (Figure 48, item CC) on spindle
(BW) is in line with center of groove (CD) on
conveyor (Z).
BQ
CC
CD
BW
Z

851-568 Rev. E 19 Dorner Mfg. Corp.
7300 Series Sanitary End Drive Conveyors
NOTES

Dorner Mfg. Corp. 20 851-568 Rev. E
7300 Series Sanitary End Drive Conveyors
Service Parts
Drive End Components
NOTE
For replacement parts other than those shown in this section, contact an authorized Dorner Service Center
or the factory. Key Service Parts and Kits are identified by the Performance Parts Kits logo . Dorner
recommends keeping these parts on hand.
2
10
11
5
1
7
6
15
16
3
17
4
18
19
20 Drive Tail Kit 21 Drive Spindle Kit
13
12 14
89
Item Part Number Description
1 802–133 Bearing Cover
2 961016MSS Hex Head Cap Screw M10–1.5x16mm
3 456055 Head Plate, Fixed, Welded
4 4588WW Cross Support Post
5 4575WW Drive Spindle, SS
6 980422MSS Square Key 4mm x 22mm
7 456080 Flange Bearing Assembly (Includes
Items 8 and 9)
8 807–1336 Plastic Plug
9 810–187 Grease Fitting, SS 1/4–28
10 960620MSS Hex Head Cap Screw M6–1.0x20mm
11 960616MSS Hex Head Cap Screw M6–1.0x16mm
12 4557WW Washdown Wiper Option
13 456049 Sleeve
14 960520MSS Hex Head Cap Screw M5–0.80 x 20mm
15 456034 Name Tag
16 914–008 Rivet
17 807–1301 Spacer
18 960612MSS Hex Head Cap Screw M6–1.0x12mm
19 4525WWMSS Frame Support Post
20 73DT–WW Drive Tail Kit w/o Wiper (Includes Items
1 through 11)
73DTWA–WW Drive Tail Kit w/Wiper – Shaft Position A
or B (Includes Items 1 through 14)
73DTWD–WW Drive Tail Kit w/Wiper – Shaft Position C
or D (Includes Items 1 through 14)
21 73DS–WW Drive Spindle Kit (Includes Items 1, 2,
and 5 through 9)
WW = Conveyor width ref.: 02, 03, 04, 05, 06, 08, 10, 12, 18
Item Part Number Description