10
Field Engineering Bulletin
Sundyne & Sunflo & HMP Gearbox Lubricant Recommendations
E
FFECTIVE
:
M
AY
2006
Rev: E
For years the preferred gearbox lubricant for Sundyne pumps and compressors has been automotive
automatic transmission fluid (ATF). However, over time the additives in automatic transmission fluid have
changed to coincide with the technical improvements in automobile transmissions. The additives in the
new formulations of ATF, such as Dexron III, have been found to have negative effects on Sundyne
gearboxes and could compromise mechanical integrity and reliability of the equipment.
ISO Viscosity Grade 32 or 46 general purpose or synthetic oils are the recommended lubricants for
Sundyne gearboxes as shown in Table 1 below. ISO VG 46 lubricants are now recommended for high
horsepower gearbox models 33X and 34X with spherical roller bearings and high ambient temperature
installations. Gearbox lube oil should be changed twice yearly or more frequently in severe environments
which may be detrimental to the lubricant. Oxidized oil is frequently characterized by a darkening and/or
thickening of the oil. Operating of gearboxes with oxidized lubricant should be avoided.
Synthetic oils possess different characteristics than conventional mineral oils which make them desirable
for various extreme conditions such as high and low temperature operation. Synthetic oils offer very low
pour points, high temperature oxidation stability and a higher viscosity index.
The operation of Sundyne equipment in high or low ambient conditions may require special consideration
of gearbox lubricant and/or supplemental protective equipment such as heat exchangers or gearbox
heaters.
The lubricant chosen must be compatible with gearbox elastomers, Viton and Buna N. Any oil that
contains an inert additive such as PTFE, molybdenum disulfide or silicon should not be used in Sundyne
gearboxes.
Use of lubricants containing inert additives will void the product warranty.
Table 1:
Use ISO Viscosity Grade 32 Lubricant **
Use ISO Viscosity Grade 46 Lubricant
Models: LMV/BMP-311
LMC/BMC-311F
LMC-BMC-311
LMV/BMP-313
LMC/BMC-313
LMV-322
All Sunflo Gearboxes
HMP-3000
HMP-5000
Models: LMV/BMP-331
LMV/BMP-341
LMC/BMC-331F
LMC/BMC-341F
LMC/BMC-331P
LMC/BMC-341P
LMV/BMP-333
LMV/BMP-343
LMC/BMC-333
LMC/BMC-343
LMC/BMC-337
LMV-346
BMP-338
LMC/BMC-347
BMP-348
** Use ISO VG 46 lubricant for high ambient temperatures above 40
°
C (100
°
F).
Summary of Contents for LMC 341F
Page 32: ...28 Figure 5 1 Compressor Cross Section and Clearances ...
Page 69: ...65 SINGLE SEAL ARRANGEMENT ...
Page 70: ...66 DOUBLE SEAL ARRANGEMENT ...
Page 71: ...67 TANDEM SEAL ARRANGEMENT ...
Page 73: ...69 Phoenix Compressor Gearbox Cross Sectional View ...
Page 74: ...70 ...
Page 75: ...71 PHOENIX GEARBOX MODULE DRAWING GB01AY01 ...
Page 76: ...72 ...
Page 77: ...73 ...
Page 78: ...74 ...
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