SEI Industries Bambi Bucket BB1214 User manual

BAMBI BUCKET
Models 6072 –1821
SERVICE MANUAL
2019A

BAMBI BUCKET SERVICE MANUAL
Models 6072-1821
Version 2019A
PLEASE READ BEFORE USING.
This manual is applicable to the following models:
BB6072 (# 007144)
BB1214 (# 007148)
BB8096 (# 007145)
BB1214S (# 008738)
BB8096S (# 005702)
BB1518 (# 007149)
BB9011 (# 007146)
BB1518S (# 005708)
BB9011S (# 008737)
BB1821 (# 007150)
BB1012 (# 007147)
BB1821S (# 008739)
BB1012S (# 005705)
BB1821L (#011067)
Copies of this manual (#000506) are available from SEI.
This manual is also available on the SEI website.
Register for manual update notifications at [e-mail]
SEI INDUSTRIES LTD.
7400 Wilson Avenue
Delta, B.C. Canada
V4G 1H3
Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]
Website: www.bambibucket.com
COPYRIGHT © 2019 SEI INDUSTRIES LTD. ALL RIGHTS RESERVED

Version
Revision Summary
2019A
•General Revision

Table of Contents
Section 1: Introduction............................................................................................................ 1
Bambi System Drawing............................................................................................................................2
Dump Valve Operation.............................................................................................................................3
Control Head Operation............................................................................................................................4
Section 2: Deploying the Bambi Bucket................................................................................. 7
Attaching to the Cargo Hook....................................................................................................................7
Connecting Power.....................................................................................................................................8
Longlines ..................................................................................................................................................8
Checking Tail Rotor Clearance.................................................................................................................9
Instant Deployment System (IDS)..........................................................................................................10
Section 3: Accessories...........................................................................................................11
PowerFill Snorkel ...................................................................................................................................11
Foam Injection Systems..........................................................................................................................12
Section 4: Making Adjustments.............................................................................................13
Adjusting the Dump Valve Udder ..........................................................................................................13
Adjusting Purse Strings...........................................................................................................................13
Section 5: Packing and Storage.............................................................................................15
Packing the Bucket .................................................................................................................................15
Storing the Bucket...................................................................................................................................17
Section 6: Troubleshooting Guide.........................................................................................19
Valve Troubleshooting............................................................................................................................19
Control Head Troubleshooting................................................................................................................20
Section 7: Repair Assessment Guide....................................................................................23
Overview of Repair Categories...............................................................................................................23
Control Head Repair Criteria..................................................................................................................24
Cables Repair Criteria.............................................................................................................................25
M-Straps/Top Chains Repair Criteria.....................................................................................................26
IDS Repair Criteria.................................................................................................................................27
Bucket Shell Repair Criteria...................................................................................................................28
Cinch Strap Repair Criteria.....................................................................................................................29
Valve Repair Criteria..............................................................................................................................30

Section 8: Repairs...................................................................................................................31
Control Head Repairs..............................................................................................................................31
Rigging Repairs ......................................................................................................................................39
Valve Repair and Replacement...............................................................................................................45
Shell Repairs...........................................................................................................................................48
Section 9: Specifications and Parts.......................................................................................55
Capacity and Weight Specifications.......................................................................................................55
Parts ........................................................................................................................................................56
Section 10: Drawings..............................................................................................................72
Section 11: Warranty ..............................................................................................................76

Section 1: Introduction
Bambi Bucket Service Manual –Models 6072-1821 1
Section 1: Introduction
This manual provides information on the service and maintenance of Bambi Bucket models 6072 to 1821.
This service manual also includes all parts lists and installation drawings. A separate Bambi Bucket
operations manual is also supplied which should be carried on-board the helicopter.
For your own protection, and for longer bucket life, always read the instructions and warnings. Ignoring
these warnings could result in personal injury, bucket damage or aircraft damage.
SEI Industries Ltd. offers complete parts supply and repair services for the Bambi Bucket. For a repair
facility in your area, please contact SEI. For maintenance and repair purposes, parts diagrams and
descriptions are provided in this manual.
When you are ordering parts, please provide the model and serial number of your Bambi Bucket as shown
on the data tags located inside the bucket shell.

Section 1: Introduction
Bambi Bucket Service Manual –Models 6072-1821 2
Bambi System Drawing

Section 1: Introduction
Bambi Bucket Service Manual –Models 6072-1821 3
Dump Valve Operation
The Bambi Bucket uses a tubular fabric valve to control the
flow of water exiting the bucket. The lower end of the tube
has a flange which is attached to a circular opening in the
bottom of the bucket.
The upper opening of the tube is flattened and has a series of
grommets and purse strings laced alternately from each side.
The lower end of each string terminates in a washer and a
knot. Each string passes through a grommet in one side of the
tube, crosses the opening, and passes through a corresponding
grommet on the other side of the tube.
The upper ends of the purse strings are attached to a metal
ring. This ring is also attached to the riser cable.
When the riser cable is pulled upwards, it pulls the ring and
puts tension on the purse strings. This draws together the top
faces of the tube and a rubber layer below the grommets seals
the upper end of the tube.
When the bucket is dipped and filled with water, the water
pressure in the bucket presses on the outside of the tube and
reinforces the seal.
To open the valve, the tension on the riser cable is released,
allowing the riser, purse strings and valve tube to move
downwards due to the weight of the water in the bucket.
The valve tube turns inside out and extends below the bottom
of the bucket. The flattened end of the tube returns to a
circular shape allowing all the water to exit the bucket.
When all the water has exited the bucket, the riser cable pulls
the valve tube back to its starting position.

Section 1: Introduction
Bambi Bucket Service Manual –Models 6072-1821 4
Control Head Operation
The control head regulates the operation of the dump valve by raising and lowering the riser cable. The
upper end of the riser is attached to the lower end of the tripline assembly. The upper end of the tripline
is attached to the spring reel which winds the tripline onto a cable drum.
In the middle of the tripline is the bullet assembly. When there is no water in the bucket, the spring reel
winds up the tripline until the lower end of the bullet assembly reaches its limit on the bottom of the trip
block.
WARNING
Do not remove the cover on the control head while operating the Bambi Bucket. With the cover
removed, the tripline safety keeper is no longer functional. Without the safety keeper, the tripline
could separate and cause a tail rotor strike resulting in severe injury or death.

Section 1: Introduction
Bambi Bucket Service Manual –Models 6072-1821 5
When the bucket is filled with water, the pressure pulls down on
the valve, riser and tripline until the upper end of the bullet
assembly engages the mechanical catch. The mechanical catch
is locked in place by the linkage arms.
To dump the valve, an electrical signal is sent to the solenoid
which pulls up on the linkage arms and unlocks the catch.
The weight of water in the bucket pulls down on the valve, riser
and tripline. The upper end of the bullet assembly pushes past
the spring-loaded catch and the tripline unwinds from the spring
reel allowing the dump valve to fully open.
When the electrical signal to the solenoid is removed, springs
return the linkage arms, solenoid, and catch to their original
positions.
When all of the water has left the bucket, the only downward
force remaining on the tripline is the weight of the valve and
riser. This weight is overcome by the spring reel which winds up
the tripline, riser and valve.
As the bullet assembly re-enters the head, it pushes past the
spring loaded catch. The tripline continues to retract into the
spring reel until the lower end of the bullet assembly reaches its
limit on the trip block. The head is now latched and ready for
another fill.