Union Pacific's Ex Missouri Pacific C36-7s
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This page was last updated on June 21, 2009.
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Overview
Total of 60 units, numbered as MP 9000-9059
Built in September-December 1985
MP 9000-9059 was the second group of new units delivered after the December 1982 merger with UP; delivered with yellow and gray paint and Missouri Pacific lettering (MP's SD50s were the first group, delivered in 1984)
The following history was written by Mark Hemphill and originally appeared as part of Union Pacific, 1992 Annual, published in 1992 by Hyrail Productions:
In 1981, the UP placed an order for 30 C36-7s. Negotiations and specification review meetings were held that year and into early 1982. The quantity was increased to 50 units, then decreased to 20. Finally, the ongoing recession permanently decided the quantity issue: none. The order was canceled in late 1982; the UP proper would not buy another new locomotive from EMD until 1986, and GE until 1987.
Following the Missouri Pacific's 1984 order for 60 SD50s, the MP, now heavily influenced by merger partner Union Pacific, placed an order for 60 C36-7s in early 1985. These locomotives were built closer to UP specifications than any previous MP locomotives. Because of technological improvements to the GE FDL engine, these locomotives were rated as-delivered at 3,750 horsepower, a precursor to the upcoming improved ratings in GE's DASH 8 series.
Of all GEs so far delivered to the MP or UP, this order was the most diverse. First, the MP requested the application of a larger-than-standard 4,500-gallon fuel tank, which required the relocation of the air reservoirs from below the platform to inside the radiator compartment. Second, the railroad requested the application of four different types of air compressors. Units 9000-9029 and 9045-9049 were equipped with Wabco air-cooled machines, 9030-9041 had Triangle water-cooled versions, 90429044 had Ingersoll-Rand air-cooled models, and 9050-9059 had Gardner-Denver water-cooled air compressors. Externally these variations were indistinguishable as GE chose to standardize on the air-cooled arrangement for the radiator compartment.
An interesting external difference of the last 10 C36-7s is because they were built on modified C30-7 platforms originally earmarked for Nacionales de Mexico's C30-7 kit program. They were never delivered due to that country's mid- 1980s financial woes. The major visible difference in these C36-7s is the presence of anti-climbers, which the other C36-7s do not have. A non-visible difference is that the last 20 locomotives used remanufactured truck bolsters from MP U30C trade-ins.
One of the high-tech features of the C36-7 fleet is their use of GE's microprocessor-controlled Motor Thermal Protection panel (MTP). This device analytically calculates the temperature of each traction motor's windings, using the ambient air temperature, amperage levels, and the motor's recent operational demands, and uses this data to establish the maximum current that can be fed to each motor should it enter its short-time rating. The MTP panel alleviates the need for the engineer to keep a close eye on the ammeter to avoid motor burnout.
An example of the advantages of this system is if the locomotive is operating in heavy grade territory in cold weather, say on Sherman Hill in January, the MTP would allow substantially longer short-time ratings because of the cold traction motor cooling air, permitting full horsepower and higher speed on the grade. Conversely, if the locomotive was on Cima Hill in the Mojave Desert on a 115-degree day in July, the MTP would allow the motor much less of a short-time rating.
All C36-7s were delivered with provisions for the installation of CCS equipment. Shortly after arriving on the property the first 30 were so equipped and soon began frequenting UP territory on hot TOFC trains and UP's developing double-stack trains. The other 30 broke in on Illinois and Missouri coal traffic for their first year until they too received CCS equipment and were allowed into system-wide service. The C36-7s immediately turned in monthly mileages approaching those of the Centennials in their prime years. Their stellar performance paved the way for the first large DASH 8-fleet in the U.S.
UP 9000 Series
All 60 units were renumbered to UP 9000-9059 beginning in February 1988 as they were upgraded by UP at North Little Rock. The upgrade program included rebuilt trucks, rebuilt engines (done by GE at Grove City, Pennsylvania), new radiators, and new UP lettering, except nine units (MP 9013, 9015, 9018, 9022-9026, 9028) which were upgraded and released without UP lettering. These nine units retained their Missouri Pacific lettering and were later relettered to Union Pacific. The upgrade program was completed in March 1989. (UP 9005 was the first, completed on 10 February 1988, and UP 9023 was the last, completed on 15 March 1989.)
UP 9025 was actually the first to be relettered from Missouri Pacific to Union Pacific, completed on 12 May 1988 during wreck repairs from a wreck at Nugget, Wyoming; released from North Little Rock shops on 17 June 1988, nine days after the first unit on 8 June 1988.
UP 2600 Series
Assigned UP 2600-2659 in September 1995, 27 units were renumbered in September 1995 through October 1996 (UP 2653, ex UP 9053, was the first, completed on 18 September 1995, and UP 2603 and 2608, ex UP 9003 and 9008, were the last, both completed on 15 October 1996).
Of the 27 units renumbered into the 2600-2659 group, a total of 12 units were renumbered into the later 600-659 group in October 1996 through December 1999 (UP 622, ex UP 2622, was the first, completed on 25 October 1996, and UP 656, ex UP 2656, was the last, completed on 9 December 1999); two units were retired as UP 2600s: UP 2655 was retired in July 1999, and UP 2638 was retired in September 1999.
UP 600 Series
Assigned UP 600-659 in October 1996; 34 units were renumbered, 12 units from the UP 2600-2659 group, and 22 units from the 9000-9059 group
A total of 22 units were renumbered direct from the 9000-9059 group to the 600-659 group in October 1996 through October 1999 (UP 619, ex UP 9019, was the first, completed on 25 October 1996, and UP 629, ex UP 9029, was the last, completed on 28 October 1999).
UP 7942 Series
Two units were retired prior to the December 1999 renumber plan. UP 2638 (ex MP 9038, UP 9038) was retired on 30 September 1999; UP 2655 (ex MP 9055, UP 9055) was retired on 30 July 1999
The other 58 units were assigned UP 7942-7999, including 34 units from the 600-659 group, 13 units from the 2600-2659 group, and 11 from the 9000-9059 group.
UP 7968 (ex UP 9026) was the first unit in this group to be renumbered, completed on 8 February 2000 (to clear the UP 9026 number for use by an ex C&NW C40-8).
Service in Estonia
Estonia (Eesti Raudtee - EVR) recieved 58 overhauled and repainted ex MoPac C36-7 locomotives (EVR 1500-1557) regauged from standard gauge to Russian 5-feet gauge along with 19 ex CR C30-7A locomotives (EVR 1558-1576)
Ed Burkhardt's Rail World purchased the units through a broker. GE modified them for use on the Estonia Railway, of which Ed was an investor and board chairman .
The first units arrived in Estonia beginning in September 2002; delivery continued through November 2002.
They were modified for use with the Russian track gauge (new trucks, Williston couplers) and reclassified as C36-7 i units, the "i" designating that they were for International service. Most are still in service in Estonia.
Roster Listing
GE C36-7 -- 60 units
3600 horsepower; C-C trucks; 391,000 pounds operating weight
| MP Number |
Builder Date |
Builder Number |
9000 Series Number |
Date To UP Number |
2600 Series Number |
Date To 2600 Series |
600 Series Number |
Date To 600 Series |
7900 Series Number |
Date To 7900 Series |
Date Retired |
Estonia Number |
| MP 9000 | Sep 1985 | 45040 | UP 9000 | 18 Nov 1988 | 8 Mar 2001 | EVR 1555 | ||||||
| MP 9001 | Sep 1985 | 45041 | UP 9001 | 9 Nov 1988 | UP 601 | 31 Oct 1996 | 19 Apr 2001 | EVR 1528 | ||||
| MP 9002 | Sep 1985 | 45042 | UP 9002 | 28 Sep 1988 | UP 602 | 25 Sep 1999 | 18 Jun 2001 | EVR 1508 | ||||
| MP 9003 | Sep 1985 | 45043 | UP 9003 | 13 Jul 1988 | UP 2603 | 15 Oct 1996 | UP 603 | 23 Apr 1997 | 31 Jul 2001 | EVR 1539 | ||
| MP 9004 | Sep 1985 | 45044 | UP 9004 | 14 Dec 1988 | 12 Jul 2001 | EVR 1512 | ||||||
| MP 9005 | Sep 1985 | 45045 | UP 9005 | 10 Feb 1988 | UP 7947 | 26 Apr 2000 | 8 Mar 2001 | EVR 1545 | ||||
| MP 9006 | Sep 1985 | 45046 | UP 9006 | 2 Nov 1988 | UP 2606 | 18 Oct 1995 | UP 606 | 28 Oct 1996 | UP 7948 | 27 Aug 2000 | 27 Apr 2001 | EVR 1546 |
| MP 9007 | Sep 1985 | 45047 | UP 9007 | 5 Oct 1988 | UP 607 | 18 Feb 1997 | 28 Jun 2001 | EVR 1529 | ||||
| MP 9008 | Sep 1985 | 45048 | UP 9008 | 12 Oct 1988 | UP 2608 | 15 Oct 1996 | UP 608 | 28 Oct 1996 | 29 Mar 2001 | EVR 1506 | ||
| MP 9009 | Sep 1985 | 45049 | UP 9009 | 8 Jul 1988 | UP 2609 | 31 May 1996 | 23 May 2001 | EVR 1516 | ||||
| MP 9010 | Sep 1985 | 45050 | UP 9010 | 11 Aug 1988 | UP 2610 | 6 Jan 1996 | UP 610 | 24 Oct 1997 | 29 Mar 2001 | EVR 1510 | ||
| MP 9011 | Sep 1985 | 45051 | UP 9011 | 15 Nov 1988 | UP 7953 | 3 Mar 2001 | 29 Mar 2001 | EVR 1552 | ||||
| MP 9012 | Sep 1985 | 45052 | UP 9012 | 18 Aug 1988 | 8 Mar 2001 | EVR 1524 | ||||||
| MP 9013 | Sep 1985 | 45053 | UP 9013 | 7 Dec 1988 | UP 613 | 21 Oct 1998 | 8 Mar 2001 | |||||
| MP 9014 | Sep 1985 | 45054 | UP 9014 | 16 Nov 1988 | 19 Jun 2001 | EVR 1517 | ||||||
| MP 9015 | Oct 1985 | 45055 | UP 9015 | 7 Feb 1989 | UP 2615 | 12 Oct 1996 | 8 Mar 2001 | EVR 1538 | ||||
| MP 9016 | Oct 1985 | 45056 | UP 9016 | 13 Sep 1988 | UP 616 | 16 Jan 1998 | 29 Mar 2001 | EVR 1549 | ||||
| MP 9017 | Oct 1985 | 45057 | UP 9017 | 4 Aug 1988 | UP 617 | 20 Jun 1997 | 31 Jul 2001 | EVR 1500 | ||||
| MP 9018 | Oct 1985 | 45058 | UP 9018 | 2 Mar 1989 | UP 2618 | 27 Feb 1996 | UP 618 | 4 Jun 1997 | 28 Jun 2001 | EVR 1511 | ||
| MP 9019 | Oct 1985 | 45059 | UP 9019 | 28 Jun 1988 | UP 619 | 25 Oct 1996 | UP 7961 | 18 Apr 2000 | 24 May 2001 | EVR 1525 | ||
| MP 9020 | Oct 1985 | 45060 | UP 9020 | 16 Dec 1988 | 27 Apr 2001 | EVR 1513 | ||||||
| MP 9021 | Oct 1985 | 45061 | UP 9021 | 28 Jun 1988 | UP 2621 | 10 Feb 1996 | 27 Apr 2001 | EVR 1502 | ||||
| MP 9022 | Oct 1985 | 45062 | UP 9022 | 3 Mar 1989 | UP 2622 | 30 Sep 1996 | UP 622 | 25 Oct 1996 | UP 7964 | 17 Jul 2000 | 29 Mar 2001 | EVR 1522 |
| MP 9023 | Oct 1985 | 45063 | UP 9023 | 15 Mar 1989 | UP 623 | 8 Feb 1999 | 8 Mar 2001 | EVR 1536 | ||||
| MP 9024 | Oct 1985 | 45064 | UP 9024 | 15 Feb 1989 | UP 624 | 9 Jul 1997 | 29 Mar 2001 | EVR 1551 | ||||
| MP 9025 | Oct 1985 | 45065 | UP 9025 | 12 May 1988 | UP 625 | 25 Nov 1997 | UP 7967 | 24 Oct 2000 | 29 Mar 2001 | EVR 1526 | ||
| MP 9026 | Oct 1985 | 45066 | UP 9026 | 3 Feb 1989 | UP 7968 | 8 Feb 2000 | 8 Mar 2001 | EVR 1548 | ||||
| MP 9027 | Oct 1985 | 45067 | UP 9027 | 1 Jul 1988 | UP 627 | 2 Jun 1997 | 8 Mar 2001 | EVR 1541 | ||||
| MP 9028 | Oct 1985 | 45068 | UP 9028 | 11 Mar 1989 | UP 628 | 19 Jan 1998 | 12 Jul 2001 | EVR 1501 | ||||
| MP 9029 | Oct 1985 | 45069 | UP 9029 | 5 Oct 1988 | UP 629 | 28 Oct 1999 | UP 7971 | 7 Sep 2000 | 27 Apr 2001 | EVR 1557 | ||
| MP 9030 | Oct 1985 | 45070 | UP 9030 | 22 Jun 1988 | UP 2630 | 5 Jun 1996 | UP 630 | 6 Aug 1998 | UP 7972 | 27 Sep 2000 | 8 Mar 2001 | EVR 1537 |
| MP 9031 | Oct 1985 | 45071 | UP 9031 | 15 Sep 1988 | UP 2631 | 23 Aug 1996 | 31 Jul 2001 | EVR 1514 | ||||
| MP 9032 | Oct 1985 | 45072 | UP 9032 | 21 Sep 1988 | UP 2632 | 4 Dec 1995 | 8 Mar 2001 | EVR 1527 | ||||
| MP 9033 | Oct 1985 | 45073 | UP 9033 | 11 Aug 1988 | UP 633 | 29 Jun 1998 | 8 Mar 2001 | EVR 1556 | ||||
| MP 9034 | Oct 1985 | 45074 | UP 9034 | 16 Jun 1988 | UP 634 | 12 Dec 1997 | UP 7976 | 31 Jul 2000 | 27 Apr 2001 | EVR 1515 | ||
| MP 9035 | Oct 1985 | 45075 | UP 9035 | 8 Jul 1988 | UP 635 | 7 May 1997 | 23 May 2001 | EVR 1519 | ||||
| MP 9036 | Oct 1985 | 45076 | UP 9036 | 20 Jul 1988 | UP 7978 | 26 Oct 2000 | 28 Jun 2001 | EVR 1507 | ||||
| MP 9037 | Oct 1985 | 45077 | UP 9037 | 19 Oct 1988 | UP 2637 | 18 Mar 1996 | UP 7979 | 28 Sep 2000 | 8 Mar 2001 | EVR 1550 | ||
| MP 9038 | Oct 1985 | 45078 | UP 9038 | 25 Jul 1988 | UP 2638 | 30 Aug 1996 | 30 Sep 1999 | |||||
| MP 9039 | Oct 1985 | 45079 | UP 9039 | 12 Oct 1988 | UP 639 | 20 Nov 1997 | 28 Jun 2001 | EVR 1505 | ||||
| MP 9040 | Oct 1985 | 45080 | UP 9040 | 8 Jun 1988 | UP 2640 | 18 Nov 1995 | 28 Jun 2001 | EVR 1540 | ||||
| MP 9041 | Oct 1985 | 45081 | UP 9041 | 15 Jul 1988 | UP 2641 | 17 Apr 1996 | 27 Apr 2001 | EVR 1518 | ||||
| MP 9042 | Oct 1985 | 45082 | UP 9042 | 23 Nov 1988 | UP 2642 | 16 Apr 1996 | UP 7983 | 26 Apr 2000 | 29 Mar 2001 | EVR 1521 | ||
| MP 9043 | Oct 1985 | 45083 | UP 9043 | 1 Nov 1988 | UP 2643 | 6 May 1996 | UP 643 | 17 Mar 1998 | 8 Mar 2001 | EVR 1530 | ||
| MP 9044 | Oct 1985 | 45084 | UP 9044 | 31 Aug 1988 | UP 644 | 27 Mar 1997 | 8 Mar 2001 | EVR 1531 | ||||
| MP 9045 | Oct 1985 | 45085 | UP 9045 | 29 Sep 1988 | UP 2645 | 11 Oct 1996 | UP 645 | 28 Oct 1996 | 27 Apr 2001 | EVR 1532 | ||
| MP 9046 | Oct 1985 | 45086 | UP 9046 | 28 Oct 1988 | UP 646 | 4 Apr 2000 | 12 Jul 2001 | EVR 1533 | ||||
| MP 9047 | Oct 1985 | 45087 | UP 9047 | 20 Oct 1988 | UP 647 | 15 Jul 1999 | 8 Mar 2001 | EVR 1534 | ||||
| MP 9048 | Oct 1985 | 45088 | UP 9048 | 22 Nov 1988 | UP 7989 | 15 Jan 2001 | 7 Feb 2001 | EVR 1504 | ||||
| MP 9049 | Oct 1985 | 45089 | UP 9049 | 9 Sep 1988 | UP 649 | 4 Sep 1999 | UP 7990 | 7 Sep 2000 | 8 Mar 2001 | EVR 1547 | ||
| MP 9050 | Oct 1985 | 45090 | UP 9050 | 9 Dec 1988 | UP 650 | 15 Feb 1997 | UP 7991 | 1 Oct 2000 | 19 Apr 2001 | EVR 1553 | ||
| MP 9051 | Oct 1985 | 45091 | UP 9051 | 9 Sep 1988 | UP 651 | 14 Dec 1998 | 8 Mar 2001 | EVR 1535 | ||||
| MP 9052 | Oct 1985 | 45092 | UP 9052 | 2 Dec 1988 | UP 2652 | 21 Mar 1996 | 8 Mar 2001 | EVR 1542 | ||||
| MP 9053 | Nov 1985 | 45093 | UP 9053 | 27 Oct 1988 | UP 2653 | 18 Sep 1995 | 18 Jun 2001 | EVR 1503 | ||||
| MP 9054 | Nov 1985 | 45094 | UP 9054 | 26 Aug 1988 | UP 2654 | 4 Dec 1995 | UP 654 | 14 Dec 1998 | 8 Mar 2001 | EVR 1520 | ||
| MP 9055 | Nov 1985 | 45095 | UP 9055 | 21 Dec 1988 | UP 2655 | 7 May 1996 | 30 Jul 1999 | EVR 1543 | ||||
| MP 9056 | Nov 1985 | 45096 | UP 9056 | 2 Sep 1988 | UP 2656 | 4 Dec 1995 | UP 656 | 9 Dec 1999 | UP 7996 | 8 Jun 2001 | 28 Jun 2001 | EVR 1509 |
| MP 9057 | Nov 1985 | 45097 | UP 9057 | 25 Aug 1988 | UP 2657 | 20 Jan 1996 | UP 657 | 7 Mar 1997 | UP 7997 | 8 Aug 2000 | 24 May 2001 | EVR 1523 |
| MP 9058 | Nov 1985 | 45098 | UP 9058 | 29 Jul 1988 | UP 2658 | 22 Dec 1995 | UP 7998 | 27 Apr 2000 | 27 Apr 2001 | EVR 1554 | ||
| MP 9059 | Nov 1985 | 45099 | UP 9059 | 17 Aug 1988 | UP 2659 | 28 Jan 1996 | 8 Mar 2001 | EVR 1544 |
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