Trek Fetch+ 4 User manual

2023 FETCH+ 4
SERVICE MANUAL

i
2023 Fetch+ 4
Contents
Steering
pages 1-4
Cable system Adjust cable
tension
Replace steering
cables
Drivetrain
pages 5-9
Belt guard Drive unit cover Belt tensionerr Adjust belt tension Align belt
Routing
pages 10-14
Rear Front Instructions
Battery
pages 15-17
Guide Install battery
guide
Lock, cover and
charge port
Headsets
pages 18-20
Rear assembly Front assembly Instructions
Frame
pages 21-25
Floor plate and
mat
Cargo box Front cover Frame assembly
1 4
3 2
8 5
6 7
Frame-tightening
sequence
Accessories
pages 26-32
Front mudguard
and light
Rear mudguard
and light and light
Ring lock Kickstand Child seats
Copyright 2022 Trek Bicycle Corporation All Rights Reserved

ii
2023 Fetch+ 4
About this manual
Scope
This manual contains parts diagrams, specications (such
as grease and torque values), instructions and helpful tips
(such as the easiest direction to route cables).
This manual does not contain instructions on all
components (such as brake callipers). Refer to the original
manufacturer for more information.
Working on a front cargo bike
The length, weight and box size make working on this
bicycle more difcult. Do not use a regular repair stand to
lift the bicycle – use a ceiling-mounted hoist.
If you do not have a hoist, you can do many repairs by
tipping the bicycle on it’s side.
Interactive models
Additional info
There are additional manuals available at Trekbikes.com/
manuals.
• E-Cargo Owner’s Manual – comprehensive instructions
that come with your bicycle
• Bosch BES3 E-bike Manual – detailed instructions on
the e-system found under Electric bikes > 2023
Legend
Zip tie
Nm Torque value
Apply threadlocker
Apply appropriate grease
Warnings
WARNING
Tighten hardware properly
Always tighten hardware to the specied torque.
Over-tightening hardware could deform or break the
hardware or components. Under-tightening hardware
could cause hardware or components to become loose.
Either situation could damage the bicycle and result in
injury to the rider.
WARNING
Re-apply threadlocker
All reused-fasteners with a pre-applied threadlocker
must be cleaned with isopropyl alcohol and have new
threadlocker applied before re-assembly. If a threadlock-
er is not applied, the fasteners may loosen, which could
damage the bicycle and result in injury to the rider.

2023 Fetch+ 4
1
Steering Drivetrain Routing Battery Headsets Frame Accessories
Steering: cable system
1
18 Nm.
2
3
14 Nm.
7
3
8
9
11
18 Nm. 2
3
3
4
6
18 Nm.
5
18 Nm.
5
3
11
10
3
13 12
4 Nm.






14
4 Nm.
15
1 Cable mount (front) – W5257125
2Bolts (M8x20 mm)
5284657
3Washers (M8)
4Bolts (M8x80 mm)
5Nuts (M8)
6 Cable mount (rear) – W5257126
7Bolts (M8x20 mm) – 5284656
8Steerer tube (rear)
5284549
9Steering disc (rear)
10 Steering disc (front) – 5284720
11 Bolts (M5x20 mm) – 5304417
12 Bolts, T25 drive (M5x10 mm) – 5284857
13 Steering column cover – W5268883
14 Steering cables – 5284692
15 Fork – W5266799
Click
here
Or

2023 Fetch+ 4
2
Steering Drivetrain Routing Battery Headsets Frame Accessories
Steering: adjust cable tension
1. Loosen the four rear cable mount bolts (2) – do not
remove them.
2. Hold the tensioning bolt (4) in place and use a 13
mm wrench to loosen the tensioning nut (5). Then,
loosen the tensioning bolt (4) to remove tension from
the cables. Repeat for the other side.
3. Move the cable mount (6) to increase tension in the
cables.
4. Tighten both tensioning bolts (4) – alternating
between them to keep the cable mount parallel –
until they are snug into the cable mount (6). Then,
tighten both tensioning nuts (5) to 18 Nm.
5. Test the front wheel steering and adjust the cable
tension, if necessary. There should be no noticeable
slack when steering quickly.
• Too loose – the wheel will feel disconnected from
the steering.
• Too tight – the steering will feel heavy with a lot of
friction.
Notice: If the cables are too tight, the bearings
will wear out much faster than if the cables are
tensioned properly.
6. Tighten all four rear cable mount bolts (2) to 18 Nm
(see Step 1).
7. Tighten both tensioning nuts (5) to 18 Nm.

2023 Fetch+ 4
3
Steering Drivetrain Routing Battery Headsets Frame Accessories
Steering: replace steering cables
Replace all four cables every two years or 10,000
km/6,000 mi.
NOTE: If a cable is damaged and needs repair, replace all
four cables – not just the damaged one.
Remove the cables from the rear disc
1. Cut the three zip ties connecting the steering cables
to the frame (see the zip tie locations on page 1).
2. Loosen the four rear cable mount bolts (2) – do not
remove them.
3. Hold the tensioning bolt (4) in place and use a 13
mm wrench to loosen the tensioning nut (5). Then,
loosen the tensioning bolt to remove tension from the
cables. Repeat for the other side.
4. Remove the two bolts (11) securing the steering
cables in the rear cable mount.
5. Slide the cable mount (6) towards the steering disc to
relieve tension on the cables.
6. Remove the cables from the steering disc.
Remove the cables from the front disc
1. Loosen the two bolts (11) securing the steering
cables in the front cable mount (1).
2. Remove the cables from the front steering disc.

2023 Fetch+ 4
4
Steering Drivetrain Routing Battery Headsets Frame Accessories
Insert the cables into the front disc
NOTE: The cables may be slightly different lengths – there
is no certain order in which you need to install them. They
will stretch and even out after use.
1. Route the four cables through the frame brackets.
2. Route one cable into the lower section of the front
steering disc. Then, route another cable in the upper
section. Install one bolt (12) into the cable mount
and torque to 4 Nm to secure the two cables.
IMPORTANT: Make sure the cable end stop is fully
inserted into the cable mount or you will not have
enough slack when you install the cables in the rear
disc.
2
1
3
3. Repeat Step 2 for the other side.
Insert the cables into the rear disc
1. Route the rear cables as shown below.
1
3
2
2. Tension the cables followings Steps 3-7 on page 2.
3. Use six zip ties to attach the cables to the frame as
shown below.






Steering: replace the steering cables (continued)

2023 Fetch+ 4
5
Steering Drivetrain Routing Battery Headsets Frame Accessories
Drivetrain: belt guard
22 Nm.
3
5 Nm.
1
1
2
2 Nm.
1
3
5 Nm.
4
5
6
7
8
8
9
1Washers (M5)
5284857
2Bolts, T25 drive (M5x10
mm)
3Bolt M6x10 mm
4 Beltring (50T) – W5285189
5Sprocket (22T) – W590978
6Belt (128T) – W571473
7Belt guard
5280793
8Belt guard bracket
9Belt guard bracket addition
*North America only
Before removing the belt
• Remove the belt guard
• Remove the rear wheel
• Remove the driveside crank arm
• Release tension in the belt (see page 8)
See the manufacturer’s specications for more info:
GatesCarbonDrive.com.
Click
here
Or

2023 Fetch+ 4
6
Steering Drivetrain Routing Battery Headsets Frame Accessories
Drivetrain: drive unit cover
1
2
4 Nm.
13
2 Nm.
3
2 Nm.
4
4
5
6
7
7
8
20Nm.
20Nm.
1Washers (M5)
5284548
2Bolts, T25 drive (M5x10 mm)
3Bolts, T25 drive (M4.8x13 mm)
4Sheet nuts (M4.8)
5Drive unit cover (non-drive side)
5280792
6Drive unit cover (drive side)
7Mounting bolts, T40 drive (M8x16 mm) – *1270.016.470
8Bosch connect module BCM3100 – *EB13.200.02L
*Bosch part numbers are not available on Trekbikes.com.
Click
here
Or

2023 Fetch+ 4
7
Steering Drivetrain Routing Battery Headsets Frame Accessories
Drivetrain: belt tensioner
7
9
10
11
1
4
7Nm.
2
2
3
3
5
6
8
12
5 Nm.
12 5 Nm.
1Belt roller
5291300
2Washers (M8)
3Bearings
4Bolt (M8x40 mm)
5Bolt socket set screw – W5282014
6Tensioner arm
5280807
7Tensioning bolt (M8x100 mm)
8Bolt (M6x60 mm)
9Tensioning nut (upper)
10 Tensioning nut (lower)
11 Coupling nut
12 Bolt M6x10 mm
Click
here
Or