REHS761 Blowby C 2.2 to C6 PDF

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Media Search - REHS3761 - Blowby from Crankcase Breather for C2.2, C3.3, C4.4, a... Page 1 of 11

Shutdown SIS Previous Screen Product: NO EQUIPMENT SELECTED Model: NO EQUIPMENT SELECTED Configuration: NO EQUIPMENT SELECTED

Special Instruction Blowby from Crankcase Breather for C2.2, C3.3, C4.4, and C6.6 Engines{1000, 1074, 1107, 1317} Media Number -REHS3761-00

Publication Date -03/08/2011

Date Updated -03/08/2011

i04388435

Blowby from Crankcase Breather for C2.2, C3.3, C4.4, and C6.6 Engines{1000, 1074, 1107, 1317} SMCS - 1000; 1074; 1107; 1317 Asphalt Compactor: CB54 (S/N: JLM1-104,106-472) CB64 (S/N: DJM1-247) Asphalt Paver: AP500E (S/N: JWK1-139,99997-99997) AP555E (S/N: A5D1-1,102-177,179-193,195-195,99998-99998) AP600D (S/N: TFM1-244,249-249,251-251; TFZ1-280) AP655D (S/N: GNN1-253; MAN1-244,246-268,270-281,283-284; MAT1-208; GNZ1389,391-394,396-396) BB-621C (S/N: B3Y1-128) Backhoe Loader: 414E (S/N: TMS1-155) 416 Series E (S/N: LMS1-886,888-1032,1047-1048,1099-1205,1207-1242) 416E Series III (S/N: GRR1-111,115-211) 416E (S/N: BWC1-159,180-372; MFG1-151) 420 Series E (S/N: DJL1-1866,1880-1880,1910-1910,1913-1913,1916-2096; DAN1319,321-1181,1183-1200,1202-1207,1238-1338,1340-1358,1371-1374) 420E (S/N: PRA1-1795; PHC1-1059; GEK1-79) 422E (S/N: DSK1-302,304-305,307-308,316-317,319-328,332-333,336-336,338-340,349652; MAW1-1067,1069-1087,1090-1090) 428E (S/N: DXC1-316,322-322,324-324,326-326,337-339,343-421,424-424,427-428,430448,450-450,452-803; DPH1-687,689-2271,2273-2276,2278-2294,2296-2296,22982302,2304-2305,2307-2314,2316-2489,2491-2519) 430 Series E (S/N: MXB1-346,348-358,364-375; SWC1-381,386-386,391-408) 430E (S/N: SCD1-384; RLN1-442) 432E (S/N: JBA1-1474,1476-1497,1499-1503,1505-1510,1514-1578,1587-1589; RXS1196,198-199,202-545) 434E (S/N: SXB1-177,186-210,215-251; SEF1-275; SJL1-374,376-390,393-394) 442E (S/N: EME1-220,222-228,231-231; PCR1-162,164-183) 444E (S/N: NBA1-246; HXB1-154,157-175) 450E (S/N: RBA1-173; EBL1-524) Industrial Engine:

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C2.2 (S/N: G7L1-241,250-250,257-260,262-290,292-387,389-702,704-705,709-813,815854,856-1376,1378-1812,1814-1873,1875-2060,2062-2168,2170-2190,2192-2363,23652756,2758-2778,2780-2909,2912-3316,3318-3509,3511-3593,3614-3652,3663-3663,36653666,3670-3670,3673-3673,3675-3697,3699-3795,3797-3893,3895-3898,3900-3921,39243965,3967-3977,3979-3979,3983-4319,4321-4342,4344-4422,4424-4779,4781-4901,49054960,4962-4999,5001-5108,5110-5231,5233-5235,5241-5257,5259-5283,5285-5289,52915311,5313-5849,5852-5861,5863-6017,6019-6258,6260-6292,6294-6314,6318-6318,63216581,6592-6646,6760-6783,6816-6824,6894-6898,8270-8270; C4M1-241,244-319,321323,325-417,419-580,582-697,699-702,704-813,815-837,839-889,934-1019,10251025,1027-1068,1070-1074,1077-1125,1128-1143,1146-1149,1151-1152,1154-1154,11581171,1173-1182,1184-1293,1295-1303,1305-1336,1338-1505,1507-1551,1556-1561,15631576,1578-1598,1603-1641,1644-1644,1647-1830,1837-1856,1858-1930,1932-1941,19431962,1964-1964,1966-1984,1986-2103,2105-2117,2120-2129,2131-2268,2270-2336,23382400,2403-2403,2405-2418,2420-2463,2465-2474,2476-2628,2630-2630,2632-2689,26912739,2741-2778,2780-2820,2822-2832,2834-3055,3057-3200,3202-3206,3209-3269,32753275,3277-3277,3279-3279,3282-3284,3296-3296,3299-3299,3301-3301,3305-3305,38953895; C6M1-202,204-204,206-212,217-218,221-223,225-228,230-259,261-264,266325,327-468,470-1124,1126-1128,1130-1130,1135-1187,1189-1328,1330-1330,13331348,1350-1360,1363-1364,1367-1368,1370-1404,1406-1418,1420-1433,1437-1454,14561523,1525-1530,1542-1542,1544-1544,1556-1558,1572-1575,1591-1600,1602-1639,16411645,1647-1730,1733-1735,1737-1739,1741-1741,1743-1743,1745-1745,1748-1753,17561770,1772-1773,1775-1780,1782-1807,1810-1812,1815-1815,1818-1819,1821-1833,18351879,1881-1882,1884-2008,2010-2016,2018-2024,2026-2039,2041-2144,2146-2191,21942201,2203-2215,2218-2218,2224-2227,2236-2236,2258-2260,2293-2295,2300-2303,23192327,2332-2335,2352-2366,2372-2381,2383-2387,2389-2397,2409-2414,2423-2423,24252442,2445-2456,2458-2460,2464-2464,2472-2486,2491-2493,2495-2495,2502-2527,25322577,2579-2719,2721-2721,2724-2741,2754-2754,2756-2829,2839-2862,2868-2959,29613013,3026-3053,3060-3062,3064-3073,3078-3080,3082-3109,3112-3144,3149-3169,31713176,3183-3200,3202-3246; G7M1-244,246-246,248-252,254-255,257-274,276-336,339355,358-399,401-408,410-521,523-536,538-566,568-590,592-597,599-642,644-649,652665,668-668,670-677,679-680,682-691,693-701,703-727,729-805,807-830,832-876,878908,910-913,915-930,932-1011,1013-1026,1028-1039,1041-1041,1043-1062,10641107,1109-1136,1138-1200,1203-1206,1208-1221,1223-1397,1399-1456,1458-1583,15851616,1618-1648,1650-1662,1664-1676,1678-1766,1768-1778,1780-1784,1786-1829,18312006,2008-2029,2031-2037,2039-2145,2147-2147,2151-2151,2153-2222,2224-2275,22772287,2289-2313,2315-2318,2320-2322,2324-2406,2408-2409,2411-2418,2420-2461,24632476,2478-2515,2517-2602,2604-2619,2621-2628,2630-2770,2772-2772,2774-2802,28042812,2814-2883,2885-2921,2923-3038,3040-3049,3051-3074,3076-3101,3103-3121,31233137,3139-3204,3206-3234,3236-3245,3247-3257,3259-3268,3270-3339,3341-3363,33663409,3411-3435,3437-3445,3447-3522,3524-3526,3528-3550,3552-3579,3581-3659,36613725,3727-3728,3730-3757,3759-3772,3774-3831,3834-3928,3930-3965,3967-3969,39713980,3983-4047,4049-4062,4064-4137,4139-4375,4377-4523,4525-4589,4591-4611,46134774,4777-4779,4786-4786,4788-4788,4790-4972,4974-4975,4977-4978,4980-5187,51895203,5205-5205,5207-5265,5267-5418,5420-5431,5433-5436,5438-5465,5468-5541,55435544,5546-5582,5584-5778,5780-5821,5823-5902,5904-5970,5972-5987,5989-6187,61896206,6208-6209,6211-6214,6216-6473,6475-7061,7064-7286,7288-7346,7348-7689,76917730,7732-7844,7857-7884,7887-8124,8126-8194,8196-8287,8289-8371,8373-8466,84688528,8530-8618,8621-8648,8650-8670,8672-8722,8724-8724,8726-8726,8728-8728,87318872,8874-8930,8932-9126,9128-9166,9170-9170,9172-9234,9236-9309,9312-9412,94149750,9752-9757,9759-10211,10213-10213,10217-10218,10222-10222,10227-10227,10231 -10232,10236-10236,10240-10241,10243-10243,10246-10246,10248-10249,1025210252,10255-10255,10257-10257,10260-10308; C8Y1-214,7562-7583; C8Z1-339,343542,545-744,747-946) C4.4 (S/N: 4441-1,4-65,68-136,138-184,188-277,280-288,291-291,296-299,301-319,321338,340-351,353-472,474-558,560-565,567-622,638-652,658-1411,1415-1419,1422-

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1424,1428-1430,1433-1433,1435-1463,1465-1574,1576-1708,1710-1846,1849-1849,18602011,2013-2144,2146-2334,2336-2742,2745-2943,2945-3644,3647-3762,3764-4018,40204346,4348-4422,4424-4426,4429-4445,4447-4481,4483-4519,4521-4611,4613-4894,48965126,5129-5356,5358-5371,5373-5518,5521-5624,5627-5636,5638-5778,5780-5980,59826020,6022-6022,6024-6113,6115-6127,6129-6380,6382-6665,6667-6679,6682-6684,66866718,6720-6879,6882-6947,6949-6962,6964-7195,7197-7413,7415-7488,7490-7492,74947511,7513-7526,7529-7621,7623-7652,7654-7691,7693-7884,7886-7918,7920-8323,83258630,8635-9095,9098-9194,9196-9196,9198-9420,9423-9772,9774-10504,1050610507,10511-10793,10795-10796,10799-10802,10804-10932,10934-10966,1096811025,11027-11517,11519-11591,11594-11771,11773-11825,11827-12075,1207712079,12083-12083,12085-12172,12174-12187,12193-12250,12252-12289,1229112292,12300-12305,12308-12315,12317-12317,12319-12319,12349-12353,1235512356,12359-12360,12362-12373,12377-12437,12440-12440,12443-12444,1244812460,12462-12463,12465-12508,12510-12599,12601-12604,12606-12615,1261912638,12647-12660,12662-12672,12674-12683,12685-12695,12708-12709,1271112711,12713-12734,12738-12742,12744-12745,12749-12750,12753-12784,1278912803,12805-12806,12810-12810,12812-12815,12817-12817,12822-12824,1284612846,12848-12848,12850-12850,12852-12852,12858-12859,12863-12863,1287712877,12883-12883) C4.4 (Mech) (S/N: 4461-UP) C6.6 (S/N: 6661-UP) Generator Set: C2.2 (S/N: JAW1-1,151-176,178-322,324-457; GBE1-183,185-200,202-212,214-665,667693,695-707,709-709,711-715,717-722,724-738,740-758,760-769,771-771,773-774,776776; XYE1-397,404-445,448-475,478-480,482-503,508-549,551-560,590-598,600-600,602 -607,611-668,670-682; E6K1-557; TAG1-296,298-298,300-300,302-487,489-489,491600,602-1026) C4.4 (S/N: NCD1-463,469-495,497-567,590-590,600-614,616-653,655-841,848-922,924996,1002-1069,1071-1155,1179-1179; D4B412-415,417-611,613-620,622-661,663693,695-1077,1079-1201,1302-1855,1857-2008,2010-2010,2012-2033,2035-2043,20462048,2050-2069,2071-2071,2073-2073,2080-2080,2084-2090,2092-2096,2100-2105,21102117,2119-2126,2132-2133,2135-2139,2141-2142,2144-2145,2147-2147,2151-2152,21552157,2159-2162,2164-2164,2166-2182,2184-2184; XYC1-297,300-303,305-466,468491,504-657,660-680; D4D1-1,612-618,622-943,946-969,971-983,1944-1945; GLD1199,202-212,214-835,837-879; N4D1-106,108-117,119-309,322-322,324-377,379-387,389 -397,399-428,430-446,448-649,651-693,695-741,830-893,895-920,922-940,942-949,9511199; XYD1-298,300-317,319-328,349-414,447-608,614-622,626-630,636-636,644-645; GLE1-302,700-756,758-764,766-902,904-914,916-916,919-919,1000-1049; NCE1237,239-300,302-320,322-336,338-346,348-626,628-704,706-745,765-782,784-795,797819,823-839,841-841; N4E1-115,117-133,135-160,162-592,594-861,863-962,964-981,983999,1100-1152,1154-1176,1178-1179,1181-1181,1183-1189,1192-1196,1198-1199; N4R1212,300-386,400-402; N4X1-108,110-128,200-386,388-464,466-479) C6.6 (S/N: SDA1-1,108-114,117-119,121-134,139-159,161-162,165-253,262-294,296332,341-380,384-387,393-396,400-402,407-423,426-435,465-549,564-566,570-571,582593,595-601,608-609; N6D1-106,108-126,128-157,159-160,162-302,304-395,3971228,1230-1433,1435-1441,1443-1489,1491-1706,1708-1708,1710-1716,1719-1752,17541835,1837-2005,2007-2037,2039-2106,2109-2110,2112-2143,2146-2157,2160-2162,21642164,2166-2167,2170-2170,2173-2173,2175-2188,2191-2193,2195-2195,2198-2207,22112212,2215-2215,2217-2245,2248-2248,2254-2275,2277-2283; MRW1-102,104-315,320326) Marine Generator Set: C4.4 (S/N: S1M1-182,184-188,190-211,214-215,218-259,262-271,273-327,329-382,384384,390-391,395-397,400-400,402-402,405-413,416-422,425-428,432-440,442-466,468469,471-476,479-481,484-491,495-501,504-505,507-543,548-552,556-560,562-565,569576,578-599,604-607,612-619,624-626,628-667,669-749,754-756,758-776,778-788,793-

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796,798-800,803-820,825-826,828-835,838-845,847-860,862-874,877-882,884-888,891943,946-952,954-958,960-965,971-984,986-990,993-1232,1235-1291,1293-1367,13691375,1377-1380,1382-1391,1393-1408,1411-1418,1420-1457,1459-1477,1479-1484,14861721,1723-1733,1735-1755,1758-1762,1764-1773,1776-1785,1787-1788,1790-1810,18121886,1888-1899,1901-1918,1921-1921,1924-1925,1927-1927,1929-1937,1939-1950,19531954,1956-1957,1959-1961,1963-1967,1969-1970,1973-1984,1986-1990,1993-1993,19962079,2082-2086,2088-2090,2092-2097,2099-2099,2101-2103,2105-2106,2108-2116,21182119,2121-2124,2126-2131,2133-2137,2139-2143,2145-2215,2217-2543,2545-2662,26642666,2668-2678,2680-2853,2855-2855,2857-2896,2899-2900,2902-3307,3309-3383,33863429,3433-3470,3474-3503,3505-3505,3507-3513,3515-3516,3519-3528,3531-3531,35353535,3539-3539,3541-3546,3549-3549,3551-3551,3555-3557,3559-3560,3563-3565,35673574,3579-3579; MMC1-295; L1K1-448,450-474,477-488,490-597,599-603) C6.6 (S/N: C6T1-104,155-158,161-167,169-221,223-231,233-237,239-240,242-242,244256,258-357,359-360,362-362,366-366,370-370,372-376) Excavator: 316E L (S/N: DZW1-133; YZZ1-1) 320E L (S/N: TNJ1-1; WBK1-194; NAZ1-1) 323E L (S/N: RAP1-145) 323E LN (S/N: TDW1-1) M313D (S/N: W3H1-861,863-866,868-931,5000-5442,5444-5446,5448-5448) M315D (S/N: W5M1-338,340-792,5000-5341,5343-5351,5353-5377,5380-5380,53825385) M316D (S/N: KMA1-109; W6A1-563,567-1187,5000-5427; D6W1-317,319-360,362363) M318D (S/N: W8P1-633,635-1213,5000-5406) M318D MH (S/N: W8R1-343,5000-5107) M318D (S/N: D8W1-218,222-222) M318D MH (S/N: D9X1-275) M322D (S/N: W2S1-438,440-455,5000-5090) M322D MH (S/N: W2T1-446,5000-5083) M322D (S/N: D2W1-264) M322D MH (S/N: D3X1-164,166-166) Integrated Toolcarrier: IT38H (S/N: JNJ1-400,500-629) Load Haul Dump: R1300G Series II (S/N: RSL1-1554,2246-2246) Motor Grader: 120M (S/N: PJB1-154; B9C1-807,1000-1001; NJD1-176; B9N1-101; CBS1-73; B9W1209; D9W1-208) 12M Series II (S/N: R9R1-105) 12M (S/N: B9F1-1121,1300-1304; B9R1-182,760-760) Mobile Hydraulic Power Unit: M316D MHPU (S/N: KMA1-109) M322D MHPU (S/N: J4M1-104) Paving Compactor: CB34 (S/N: 3451-429,431-432,435-529,531-534,536-536,542-546,548-550,552-553,557560,565-567,569-579,584-604,608-614,619-621,623-626,628-629,634-636,638-639) CC34 XW (S/N: 3461-265,272-274,278-278) Pipelayer: PL61 (S/N: WGS1-182) Vibratory Soil Compactor: CP44 (S/N: MPC1-158,162-162,167-170) CP54 (S/N: C5Y1-113) CP54B (S/N: ALL1-1) CP56 (S/N: C5P1-591,593-604; FCP1-130,132-132,134-149)

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CP64 (S/N: P7F1-110; C6P1-126) CP74 (S/N: P8F1-105,107-109,111-113,115-119) CP76 (S/N: C7L1-132,149-164; JCP1-133) CS44 (S/N: M4C1-173,175-177,180-181,183-184,186-189,191-191; M4S1-126,128129,131-131) CS54 (S/N: C5R1-1,103-544,550-550,552-557,559-560; C5W1-1,102-327,329-395,397413,415-425,428-460,462-551,557-559,561-562,565-567) CS56 (S/N: JMM1-367; C5S1-1374,1377-1377,1379-1389,1394-1404,1406-1409; FCS1452,454-457,461-461,463-745,747-747,749-749) CS64 (S/N: C7F1-146,150-183; C6S1-138; WSW1-102) CS74 (S/N: C8F1-401,405-457; C8S1-148,150-150) CS76 (S/N: JCS1-182,184-184; CYX1-299,304-346,348-424,426-537,539-633,637639,643-644) Multi Terrain Loader: 247B (S/N: MTL1-202,228-2733,2800-4747,5075-5510,5700-6507,6509-6707,6709-6819) 247B2 (S/N: MTL1-202,228-2733,2800-4747,5075-5510,5700-6507,6509-6707,67096819) 247B3 (S/N: TSL1-1,310-692,695-732) 257B (S/N: SLK1-355,381-4153,4250-5654,5656-7036,7300-7905,8300-9430,94369821,99531-99531) 257B2 (S/N: SLK1-355,381-4153,4250-5654,5656-7036,7300-7905,8300-9430,94369821,99531-99531) Skid Steer Loader: 216B (S/N: RLL1-1,176-3157,3200-6331,6800-7518,7700-10401,52914-52914) 216B2 (S/N: RLL1-1,176-3157,3200-6331,6800-7518,7700-10401,52914-52914) 216B3 (S/N: JXM1-1,280-1601) 226B (S/N: MJH1-206,232-1739,1754-4069,4071-5526,5600-6792,6794-6813,68157455,7457-9945,10575-11646,12175-14387,14389-15173,70753-70753) 226B2 (S/N: MJH1-206,232-1739,1754-4069,4071-5526,5600-6792,6794-6813,68157455,7457-9945,10575-11646,12175-14387,14389-15173,70753-70753) 226B3 (S/N: MWD1-1,290-1955) 232B (S/N: SCH1-1,226-1440,1600-2250,2475-2712,2825-3997) 232B2 (S/N: SCH1-1,226-1440,1600-2250,2475-2712,2825-3997) 242B (S/N: BXM1-224,250-2243,2400-2987,2991-2995,2999-3922,4226-4495,4775-5482) 242B2 (S/N: BXM1-224,250-2243,2400-2987,2991-2995,2999-3922,4226-4495,47755482) Track-Type Loader: 953D (S/N: LBP1-462,700-994,1200-1322,1324-1351,1354-1362,1364-1364) 963D (S/N: LCS1-474,700-1203,1400-1461,1463-1635,1637-1638,1642-1670,16761676,1678-1679) Track-Type Tractor: D3K Series 2 (S/N: KFF1-102; KLL1-1) D3K LGP (S/N: JTD1-171,175-175) D3K (S/N: FFF1-706,710-718) D3K LGP (S/N: LLL1-997,999-1000) D4K Series 2 (S/N: KMM1-121; KRR1-1) D4K XL (S/N: MMM1-685,687-687) D4K LGP (S/N: RRR1-512) D5K Series 2 (S/N: KWW1-143; KYY1-153) D5K (S/N: JLF1-261) D5K XL (S/N: WWW1-1304,1308-1308,1312-1334,1337-1338) D5K LGP (S/N: YYY1-1332,1341-1367) D6K LGP (S/N: DHA1-1101,1200-1386,1500-1680,1682-1682,1686-1686,16911694,1696-1696) D6K (S/N: NCF1-131)

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D6K XL (S/N: HMG1-5; FBH1-1448,1500-1671,1800-1928,1930-1965,1969-1969) D6N XL (S/N: DJA1-1202; JAH1-368; LJR1-310,312-312,315-353,355-355,357-357,364 -383,385-385) D6N LGP (S/N: GHS1-260,262-742,744-745,747-748,750-751,753-814,816-819,821822,824-824,826-830,832-832,835-837,839-839,841-841) D6N XL (S/N: MLW1-417,420-421) D6N LGP (S/N: DJY1-1741) Underground Drill: UD245 (S/N: DCX1-1) Wheel Loader: 910H (S/N: SAT1-730,801-1152,1157-1158,1160-1162,1164-1167) 924H (S/N: HXC1-451,550-1620,1800-2415,2417-2422,2424-2444,2446-2456; JTM1283,600-840,842-1113; KLN1-1038,1040-1082; LKW1-38) 924HZ (S/N: RCB1-1; WLB1-961,964-1000; PED1-1102; JZZ1-309,311-312,314-324) 928H (S/N: RSB1-310) 928HZ (S/N: BYD1-561; CXK1-936,1100-1448) 930H (S/N: DHC1-409,600-1882,2000-2750,2752-2755,2757-2760,2764-2782,27852824,2826-2826,2828-2831; FTD1-248,650-1524) 938H (S/N: MCC1-433; MJC1-1528; JKM1-1537; LKM1-652,1000-1484,14861486,1488-1535) Wheel Tractor-Scraper: 613G (S/N: YCB1-28)

Introduction There have been a number of isolated reports of excessive blowby from the engine. This Special Instruction is designed to assist the Caterpillar dealer.

Common Terminology Blowby (BBY) is a description used for crankcase gasses that are vented from the engine. Oil carry over (OCO) is contained within the blow-by gas. The oil carry over can be classified as liquid or aerosol (vapor). Blowby typically contains oil carry over. Oil carry over can be divided into two classes based on particle size: • Drip (visible drips) • Aerosol (suspended oil drops that create the smoke seen at the crankcase vent) Oil drips consists of large oil droplets. This type of oil carry over is easily deposited on surfaces as visible oil. Aerosol refers to suspended particles, that are smaller than drips but may lead to staining when allowed to condense on adjacent surfaces. The amount of liquid and aerosol present is dependent on the separation technology used within the crankcase ventilation system.

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Sources of Blow-by and Oil Carry Over Blowby gases are a result of leakage into the crankcase via the piston rings, turbocharger seals, valve guides, and auxiliary pumps such as air compressors. Blowby gases can contain white, blue, or gray vapors but are often invisible. Blowby gasses also contain moisture that can condense into water drips or visible mist, this may be apparent during cold starts or during cold ambient running. The moisture is a result of the combustion process.

Crankcase Breather Systems All crankcase breather systems contain some form of primary separation that is attached to a secondary venting system. Primary separation is usually an integral part of the engine, most systems vent from the top cover. The primary separator provides a substantial amount of liquid oil control. Secondary systems can be divided into three categories: • Open Circuit Breather (OCB). • Filtered Open Breather (FOB). • Closed Circuit Breather (CCB).

Open Circuit Breather The simplest version of a crankcase breather system consists of a vent hose routed down the side of the engine. This hose does not contribute to further separation and will allow drips to be discharged. Under certain conditions, up to 30 drips per hour can be expected from the open breather system. In certain territories, there may be local legislation that prohibits the use of the open circuit breather. The routing of the open breather vent hose requires careful consideration to prevent oil being discharged on to surfaces of the application.

Filtered Open Breather The filtered open breather system uses secondary separation to remove a majority of the liquid oil that would normally form drips. However, the filtered open breather is not considered to be dripfree. Typically, one or two trips per day would be expected. The routing of the filtered open breather vent hose also requires some consideration as the gases may cause staining on surfaces.

Closed Circuit Breather The closed circuit brea...