Service Parts Identification............................................................................................................................................................5
Date code............................................................................................................................................................................................ 6
About service bulletins...................................................................................................................................................................6
Procedure to identify a part..........................................................................................................................................................7
Regional part numbers............................................................................................................................................................. 7
Example of parts identification (H1T 45/53)......................................................................................................................7
Order code.......................................................................................................................................................................................... 9
Common parts and special hardware
Common parts................................................................................................................................................................................ 10
Special hardware H1..................................................................................................................................................................... 12
Special hardware H2..................................................................................................................................................................... 14
Special hardware P1......................................................................................................................................................................16
Special hardware P3......................................................................................................................................................................18
Special hardware P4......................................................................................................................................................................20
Special hardware PN.....................................................................................................................................................................22
Rear discplacement
Rear displacement A, C, N...........................................................................................................................................................24
Controls
Control A2, A3................................................................................................................................................................................. 26
Control A4.........................................................................................................................................................................................28
Control A5.........................................................................................................................................................................................30
Control A8.........................................................................................................................................................................................32
Control A9, B1..................................................................................................................................................................................34
Control B5.........................................................................................................................................................................................36
Control B6.........................................................................................................................................................................................38
Control B8.........................................................................................................................................................................................40
Control D7.........................................................................................................................................................................................42
Control D9.........................................................................................................................................................................................44
Control E1......................................................................................................................................................................................... 46
Control G1.........................................................................................................................................................................................48
Control H2.........................................................................................................................................................................................50
Control H4.........................................................................................................................................................................................52
Control M1........................................................................................................................................................................................54
Control M2........................................................................................................................................................................................56
Control N1, N2.................................................................................................................................................................................58
Control N5, N6.................................................................................................................................................................................60
Control NN........................................................................................................................................................................................62
Aux mounting H1, H2...................................................................................................................................................................92
Aux mounting H3-H8....................................................................................................................................................................94
Aux mounting NN..........................................................................................................................................................................96
Aux mounting T1, T2.....................................................................................................................................................................98
Aux mounting T3, T8..................................................................................................................................................................100
Aux mounting TN........................................................................................................................................................................ 102
Charge pump M, N......................................................................................................................................................................120
Overhaul seal kit...........................................................................................................................................................................126
H1T045R A A N A2 C3
N D1 F G7 H7 35 35 35
35 N P 28 PN C01 NNN
1400730
Parts Manual
H1 Tandem 045/053cc
General information
Service Parts Identification
Nameplate
The following information and procedure is used to identify the module group, item number,
manufacture date, part number, and part name of the parts included in the H1 45/53 tandem pumps.
The parts listed include all parts which may be used when performing either “Minor Repairs”, “Major
Repairs” or “Conversions” on the H1T 045/053.
Each unit will have a nameplate affixed to the housing. The nameplate will include the following
information:
Model Code
The Danfoss model code completely defines the specific unit and must be used when ordering parts to
service this product.
Model Number
The Danfoss model number is used by the factory in manufacturing. On repeat orders, a complete unit
can be ordered by the model number.
Serial Number
The Danfoss serial number is used to identify the manufacture date and the unit sequence in the build.
The serial number is also used to identify the units warranty time period.
The letter code indicates the location of original manufacture (assembly).
The first number (2 digits) indicates the year of manufacture. The second number (2 digits) indicates the
calendar week of manufacture.
The third number (5 digits) is a sequential number used to identify a specific unit.
Danfoss | December 2021AX152886482422en-000802 | 5
Parts Manual
H1 Tandem 045/053cc
General information
Date code
About service bulletins
The date code is defined as the year and week of manufacture. The same item number may list more than
one part number. This indicates that there is more than one configuration for that item number. You will
see that there are different date codes for the different part numbers. Find the date code of your unit
from the nameplate to determine which service part number you need to order.
Example: The service part desired is item G30
Order CodeItemDate BeginDate EndPart NumberPart NameQty. per
80G3089-178000243End cap gasket 1
G3089-168000151End cap gasket
(SB-1995-006)
Model/Kit
1
All units using this order code with a date code prior to 89-17 must use part number “8000151.” All units
with a date code of 89-17 and newer must use part number “8000243.”
A Service Bulletin Number (SB-_ _ _ _ - _ _ _) may follow the “Part Name” of the part you desire. You must
read that Service Bulletin prior to ordering that part. The information contained in these Service Bulletins,
as of the print date of this bulletin, are included at the end of this manual. Service Bulletins contain more
detailed information such as interchangeability, what additional parts are involved, etc. It is suggested
that you add additional Service Bulletins to this manual as you receive them.
The modular design of this product results in a simplified service parts list and part number identification
procedure.
The same item numbers are used for same part names on all units within a product type. A part number
that has another number following it in parentheses is done to make this a world wide manual.
Regional part numbers
Some part numbers are region specific and should be ordered accordingly.
As an example, the part number (example: 314583 (9008000-0118) will be used. The first number is sold
in Germany. The number in parentheses is sold in the United States. Customers would order
9008000-0118 if ordering the part in the United States.
Example of parts identification (H1T 45/53)
The nameplate on an H1 pump has an Order Code of H1T045R A A N A2 C3 N D1 F G7 H7 35 35 3535 N P
28 PN C01 NNN. Use the following procedures to determine the part number of the driveshaft used on
this pump.
1. Refer to the input shaft module in the order code.
The input shaft option for this pump is identified by the code “G7” (H1T045R A A N A2 C3 N D1 F G7
H7 35 35 35 35 N P 28 PNC01 NNN).
2. Refer to the service parts list and find the shaft group.
3. Find the order code that relates tot his unit, which is “G7.”
The shaft is found to be item J100 and part number 141942.