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SERIES 50 MAINTENANCE OF VEHICLE ENGINES

Vehicle engine components must be maintained at various intervals. ‪

6,000 Miles (10,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 6,000 miles (10,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

7,500 Miles (12,000 km) Interval Maintenance

Every 7,500 miles (12,000 km), the following components must be inspected, serviced, corrected or replaced as necessary. ‪

12,000 Miles (19,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 12,000 miles (19,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

15,000 Miles (24,000 km) or 6 Month Interval Maintenance

The following components must be replaced every 15,000 miles (24,000 km) or 6 months. ‪

18,000 Miles (29,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

24,000 Miles (39,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 24,000 miles (39,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

30,000 Miles (48,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 30,000 miles (48,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

30,000 Miles (48,000 km) or 12 Month Interval Maintenance

Every 30,000 miles (48,000 km) or 12 months, the following components must be inspected, serviced, corrected or replaced as necessary. ‪

Likewise, the following components must be replaced every 30,000 miles (48,000 km) or 12 months. ‪

36,000 Miles (58,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 36,000 miles (58,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

42,000 Miles (68,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 42,000 miles (68,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

45,000 Miles (72,000 km) or 18 Month Interval Maintenance

Every 45,000 miles (72,000 km) or 18 months, the following components must be inspected, serviced, corrected or replaced as necessary. ‪

Likewise, the following components must be replaced every 45,000 miles (72,000 km) or 18 months. ‪

48,000 Miles (77,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 48,000 miles (77,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

54,000 Miles (87,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 54,000 miles (87,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

60,000 Miles (97,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 60,000 miles (97,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

60,000 Miles (97,000 km) or 24 Month Interval Maintenance

Every 60,000 miles (97,000 km) or 24 months, the following components must be inspected, serviced, corrected or replaced as necessary. ‪

Likewise, the following components must be replaced every 60,000 miles (97,000 km) or 24 months. ‪

66,000 Miles (106,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 66,000 miles (106,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

72,000 Miles (116,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 72,000 miles (116,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

75,000 Miles (121,000 km) or 30 Month Interval Maintenance

Every 75,000 miles (121,000 km) or 30 months, the following components must be inspected, serviced, corrected or replaced as necessary. ‪

Likewise, the following components must be replaced every 75,000 miles (121,000 km) or 30 months. ‪

78,000 Miles (126,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 78,000 miles (126,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

84,000 Miles (135,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 84,000 miles (135,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

90,000 Miles (145,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 90,000 miles (145,000 km), the following components must be inspected, serviced, corrected or replaced as necessary. ‪

90,000 Miles (145,000 km) or 36 Month Interval Maintenance

Every 90,000 miles (145,000 km) or 36 months, the following components must be inspected, serviced, corrected or replaced as necessary. ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

Likewise, the following components must be replaced every 90,000 miles (145,000 km) or 36 months. ‪

96,000 Miles (154,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 96,000 miles (154,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

102,000 Miles (164,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 102,000 miles (164,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

105,000 Miles (169,000 km) or 42 Month Interval Maintenance

Every 105,000 miles (169,000 km) or 42 months, the following components must be inspected, serviced, corrected or replaced as necessary. ‪

Likewise, the following components must be replaced every 105,000 miles (169,000 km) or 42 months. ‪

108,000 Miles (174,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 108,000 miles (174,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

114,000 Miles (183,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 114,000 miles (183,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

120,000 Miles (193,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 120,000 miles (193,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

120,000 Miles (193,000 km) or 48 Month Interval Maintenance

Every 120,000 miles (193,000 km) or 48 months, the following components must be inspected, serviced, corrected or replaced as necessary. ‪

Likewise, the following components must be replaced every 120,000 miles (193,000 km) or 48 months. ‪

126,000 Miles (203,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 126,000 miles (203,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

132,000 Miles (212,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 132,000 miles (212,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

135,000 Miles (217,000 km) or 54 Month Interval Maintenance

Every 135,000 miles (217,000 km) or 54 months, the following components must be inspected, serviced, corrected or replaced as necessary. ‪

Likewise, the following components must be replaced every 135,000 miles (217,000 km) or 54 months. ‪

138,000 Miles (222,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 138,000 miles (222,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

144,000 Miles (232,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 144,000 miles (232,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

150,000 Miles (241,000 km) Interval Maintenance (City Coach Only)

The oil must be changed on a City Coach Engine. ‪

Every 150,000 miles (241,000 km), the following components must be lubricated; ‪

  • Fan hub bearings, refer to Section
  • Idler pulley bearings, refer to Section

    Note: If grease fittings are installed on the fan hub and the idler pulley support, the fan hub bearings and fan belt idler pulley bearings must be lubricated.

150,000 Miles (241,000 km) or 60 Month Interval Maintenance

Every 150,000 miles (241,000 km) or 60 months, the following components must be inspected, serviced, corrected or replaced as necessary. ‪

Likewise, the following components must be replaced every 150,000 miles (241,000 km) or 60 months. ‪