DTM70-H Pump Selection and Flow Setting (DM20011)
Download: EXT-DTM-001 DTM-H PUMP SELECTION FLOW SETTING.pdf
Technical Support
Subject
DTM70-H Pump Selection and Flow Setting (DM20011)
Document Version Department Revision Details Revised by Tech Engineering Implemented
EXT-DTM-001 A Eng Document Release BDJ 2 May 2018 GB 2 May 2018 CM 3 May 2018 3 May 2018
Knowledge Base Email: tech@vmacair.com : www.kb.vmacair.com Page 1 of 4
Web: www.vmacair.com
Technical Support: 1(888)241-2289
Toll Free:1(800)738-8622 Fax: 1(877)740-3201
System or Parts affected
System
DM20011 - DTM70-H, FORD 6.7L F250-F550, 2017+
Parts
4500147 PUMP, HYDRAULIC, DTM70-H, FORD,026
4500148 PUMP, HYDRAULIC, DTM70-H, FORD,037
4500149 PUMP, HYDRAULIC, DTM70-H, FORD,055
4500150 PUMP, HYDRAULIC, DTM70-H, FORD,061
Index
System or Parts affected ................................................................................................................. 1
Overview ........................................................................................................................................... 1
Before placing an order................................................................................................................... 2
Hydraulic Pump Options ................................................................................................................. 2
Pump Port Styles .......................................................................................................................... 2
Performance Calculation................................................................................................................. 3
Flow calculation formulas:............................................................................................................. 3
Hydraulic Pump Identification ........................................................................................................ 3
Overview
The VMAC DTM70-H Air Compressor is a Direct-Transmission™ mounted PTO driven air
compressor with hydraulic pump. The air compressor and hydraulic pump are designed to run
simultaneously. The air flow (cfm) and hydraulic flow (gpm) are dependent on the pump size and the
engine speed (rpm). VMAC offers 4 hydraulic pumps which have all been approved for use with the
DTM70-H. This document outlines how to select the hydraulic pump and engine speed to meet the air
and hydraulic demands of the application. (Figure 1)
Figure 1 – DTM70-H Transmission-Mounted™ Air / Hydraulic SystemTechnical Support
Subject
DTM70-H Pump Selection and Flow Setting (DM20011)
Document Version Department Revision Details Revised by Tech Engineering Implemented
EXT-DTM-001 A Eng Document Release BDJ 2 May 2018 GB 2 May 2018 CM 3 May 2018 3 May 2018
Knowledge Base Email: tech@vmacair.com : www.kb.vmacair.com Page 2 of 4
Web: www.vmacair.com
Technical Support: 1(888)241-2289
Toll Free:1(800)738-8622 Fax: 1(877)740-3201
Before placing an order
• Read the following sections on pump selection and flow setting.
• Determine the minimum and maximum flow requirements for the application.
Hydraulic Pump Options
• VMAC offers 4 hydraulic pumps which have been approved for use with the DTM70-H. These pumps
have been tested by VMAC with the DTM70-H system and verified to provide adequate clearance
between the pump, vehicle and drivetrain components.
• Gear pump options are listed below. (Table 1, Figure 2)
Installation of hydraulic pumps not approved by VMAC may result in damage to the front
driveshaft, VMAC compressor assembly, vehicle transmission, or the PTO, and may void
the VMAC warranty.
Pump Port Styles:
• Table 1 summarizes the inlet and outlet port sizes for each pump option.
• Figure 2 illustrates location / orientation of the pump ports.
Item # Part # Description Inlet Port Outlet Port
1 4500147 PUMP, HYDRAULIC, DTM70-H, FORD,026 #12 ORB #10 ORB
2 4500148 PUMP, HYDRAULIC, DTM70-H, FORD,037 #12 ORB #10 ORB
3 4500149 PUMP, HYDRAULIC, DTM70-H, FORD,055 #12 ORB #10 ORB
4 4500150 PUMP, HYDRAULIC, DTM70-H, FORD,061 #16 ORB #10 ORB
Table 1 – Pump part numbers
Figure 2 – Pump portsTechnical Support
Subject
DTM70-H Pump Selection and Flow Setting (DM20011)
Document Version Department Revision Details Revised by Tech Engineering Implemented
EXT-DTM-001 A Eng Document Release BDJ 2 May 2018 GB 2 May 2018 CM 3 May 2018 3 May 2018
Knowledge Base Email: tech@vmacair.com : www.kb.vmacair.com Page 3 of 4
Web: www.vmacair.com
Technical Support: 1(888)241-2289
Toll Free:1(800)738-8622 Fax: 1(877)740-3201
Performance Calculation
Refer to Table 2 below for air flow and hydraulic flow at several common engine speed settings.
Table 2 – Compressor and hydraulic pump performance chart
To accurately determine pump output gpm or the engine rpm set point, reference the pump displacement
table (Table 3) below and apply figures to the flow calculation formulas provided:
Part # Description Displacement, gpr
[Gal/Rev]
4500147 PUMP, HYDRAULIC, DTM70-H, FORD,026 0.0026
4500148 PUMP, HYDRAULIC, DTM70-H, FORD,037 0.0037
4500149 PUMP, HYDRAULIC, DTM70-H, FORD,055 0.0055
4500150 PUMP, HYDRAULIC, DTM70-H, FORD,061 0.0061
Table 3 – Displacement / gpr
Flow calculation formulas:
To determine gpm of a pump at a set engine rpm:
��� = (�������) × (���������) × 1.24(��� �����) × 0.90(���� ����������)
To determine engine rpm for a desired flow:
(���������) = ���
(������� × 1.24(��� �����) × 0.90(���� ����������))
Hydraulic Pump Identification
The hydraulic pump installed on the DTM-H can be identified by doing the following:
• Locate the Parker part number.
o Look for a small part number ID plate of the top of the pump body (Figure 3).
o Record the 10 digit part number.
o Refer to Table 4 to determine the VMAC pump part number.
• If the part number is not visible or the tag is missing, measure pump length:
o Measure the length of the pump body as shown in Figure 3.
o Refer to Table 4 to determine the VMAC pump part numberTechnical Support
Subject
DTM70-H Pump Selection and Flow Setting (DM20011)
Document Version Department Revision Details Revised by Tech Engineering Implemented
EXT-DTM-001 A Eng Document Release BDJ 2 May 2018 GB 2 May 2018 CM 3 May 2018 3 May 2018
Knowledge Base Email: tech@vmacair.com : www.kb.vmacair.com Page 4 of 4
Web: www.vmacair.com
Technical Support: 1(888)241-2289
Toll Free:1(800)738-8622 Fax: 1(877)740-3201
Figure 3 – Pump identification points
VMAC Part # Description Part # on
Pump
Pump body length
IN (mm)
4500147 PUMP, HYDRAULIC, DTM70-H, FORD,026 3349110028 2.22 (56)
4500148 PUMP, HYDRAULIC, DTM70-H, FORD,037 3349110029 2.47 (63)
4500149 PUMP, HYDRAULIC, DTM70-H, FORD,055 3349110031 2.90 (74)
4500150 PUMP, HYDRAULIC, DTM70-H, FORD,061 3349110097 3.03 (77)
Table 4 – Pump number / body length